diff --git a/phasm/compiler.py b/phasm/compiler.py
index 4b0a9fa..3bb8d21 100644
--- a/phasm/compiler.py
+++ b/phasm/compiler.py
@@ -36,7 +36,23 @@ INSTANCES = {
         'a=i64': stdlib_types.i64_num_add,
         'a=f32': stdlib_types.f32_num_add,
         'a=f64': stdlib_types.f64_num_add,
-    }
+    },
+    type3classes.Num.operators['-']: {
+        'a=u32': stdlib_types.u32_num_sub,
+        'a=u64': stdlib_types.u64_num_sub,
+        'a=i32': stdlib_types.i32_num_sub,
+        'a=i64': stdlib_types.i64_num_sub,
+        'a=f32': stdlib_types.f32_num_sub,
+        'a=f64': stdlib_types.f64_num_sub,
+    },
+    type3classes.Num.operators['*']: {
+        'a=u32': stdlib_types.u32_num_mul,
+        'a=u64': stdlib_types.u64_num_mul,
+        'a=i32': stdlib_types.i32_num_mul,
+        'a=i64': stdlib_types.i64_num_mul,
+        'a=f32': stdlib_types.f32_num_mul,
+        'a=f64': stdlib_types.f64_num_mul,
+    },
 }
 
 def phasm_compile(inp: ourlang.Module) -> wasm.Module:
@@ -108,8 +124,6 @@ def type3(inp: type3types.Type3OrPlaceholder) -> wasm.WasmType:
 
 # Operators that work for i32, i64, f32, f64
 OPERATOR_MAP = {
-    '-': 'sub',
-    '*': 'mul',
     '==': 'eq',
 }
 
diff --git a/phasm/stdlib/types.py b/phasm/stdlib/types.py
index 72e5b43..7d64f54 100644
--- a/phasm/stdlib/types.py
+++ b/phasm/stdlib/types.py
@@ -83,3 +83,39 @@ def f32_num_add(g: Generator) -> None:
 
 def f64_num_add(g: Generator) -> None:
     g.add_statement('f64.add')
+
+def u32_num_sub(g: Generator) -> None:
+    g.add_statement('i32.sub')
+
+def u64_num_sub(g: Generator) -> None:
+    g.add_statement('i64.sub')
+
+def i32_num_sub(g: Generator) -> None:
+    g.add_statement('i32.sub')
+
+def i64_num_sub(g: Generator) -> None:
+    g.add_statement('i64.sub')
+
+def f32_num_sub(g: Generator) -> None:
+    g.add_statement('f32.sub')
+
+def f64_num_sub(g: Generator) -> None:
+    g.add_statement('f64.sub')
+
+def u32_num_mul(g: Generator) -> None:
+    g.add_statement('i32.mul')
+
+def u64_num_mul(g: Generator) -> None:
+    g.add_statement('i64.mul')
+
+def i32_num_mul(g: Generator) -> None:
+    g.add_statement('i32.mul')
+
+def i64_num_mul(g: Generator) -> None:
+    g.add_statement('i64.mul')
+
+def f32_num_mul(g: Generator) -> None:
+    g.add_statement('f32.mul')
+
+def f64_num_mul(g: Generator) -> None:
+    g.add_statement('f64.mul')
diff --git a/phasm/type3/constraints.py b/phasm/type3/constraints.py
index 65061e7..e0f9e43 100644
--- a/phasm/type3/constraints.py
+++ b/phasm/type3/constraints.py
@@ -292,14 +292,14 @@ class MustImplementTypeClassConstraint(ConstraintBase):
     type3: types.Type3OrPlaceholder
 
     DATA = {
-        'u8': {'BitWiseOperation', 'BasicMathOperation', 'EqualComparison', 'StrictPartialOrder'},
-        'u32': {'BitWiseOperation', 'BasicMathOperation', 'EqualComparison', 'StrictPartialOrder'},
-        'u64': {'BitWiseOperation', 'BasicMathOperation', 'EqualComparison', 'StrictPartialOrder'},
-        'i32': {'BasicMathOperation', 'EqualComparison', 'StrictPartialOrder'},
-        'i64': {'BasicMathOperation', 'EqualComparison', 'StrictPartialOrder'},
+        'u8': {'BitWiseOperation', 'EqualComparison', 'StrictPartialOrder'},
+        'u32': {'BitWiseOperation', 'EqualComparison', 'StrictPartialOrder'},
+        'u64': {'BitWiseOperation', 'EqualComparison', 'StrictPartialOrder'},
+        'i32': {'EqualComparison', 'StrictPartialOrder'},
+        'i64': {'EqualComparison', 'StrictPartialOrder'},
         'bytes': {'Foldable', 'Sized'},
-        'f32': {'BasicMathOperation', 'FloatingPoint'},
-        'f64': {'BasicMathOperation', 'FloatingPoint'},
+        'f32': {'Fractional', 'FloatingPoint'},
+        'f64': {'Fractional', 'FloatingPoint'},
     }
 
     def __init__(self, type_class3: Union[str, typeclasses.Type3Class], type3: types.Type3OrPlaceholder, comment: Optional[str] = None) -> None:
diff --git a/phasm/type3/constraintsgenerator.py b/phasm/type3/constraintsgenerator.py
index e21f504..724c735 100644
--- a/phasm/type3/constraintsgenerator.py
+++ b/phasm/type3/constraintsgenerator.py
@@ -113,11 +113,11 @@ def expression(ctx: Context, inp: ourlang.Expression) -> ConstraintGenerator:
                 comment=f'({inp.operator}) :: a -> a -> a')
             return
 
-        if inp.operator in ('-', '*', '/', ):
+        if inp.operator in ('/', ):
             yield from expression(ctx, inp.left)
             yield from expression(ctx, inp.right)
 
-            yield MustImplementTypeClassConstraint('BasicMathOperation', inp.left.type3)
+            yield MustImplementTypeClassConstraint('Fractional', inp.left.type3)
             yield SameTypeConstraint(inp.left.type3, inp.right.type3, inp.type3,
                 comment=f'({inp.operator}) :: a -> a -> a')
             return
diff --git a/phasm/type3/typeclasses.py b/phasm/type3/typeclasses.py
index 56f1d3d..e966521 100644
--- a/phasm/type3/typeclasses.py
+++ b/phasm/type3/typeclasses.py
@@ -54,4 +54,6 @@ class Type3Class:
 
 Num = Type3Class('Num', ['a'], methods={}, operators={
     '+': 'a -> a -> a',
+    '-': 'a -> a -> a',
+    '*': 'a -> a -> a',
 })
diff --git a/tests/integration/test_lang/test_num.py b/tests/integration/test_lang/test_num.py
index 70ec473..8f628e5 100644
--- a/tests/integration/test_lang/test_num.py
+++ b/tests/integration/test_lang/test_num.py
@@ -110,7 +110,33 @@ def testEntry() -> u32:
 
     assert 4294967295 == result.returned_value
 
-# TODO: Multiplication
+@pytest.mark.integration_test
+@pytest.mark.parametrize('type_', INT_TYPES)
+def test_multiplication_int(type_):
+    code_py = f"""
+@exported
+def testEntry() -> {type_}:
+    return 10 * 3
+"""
+
+    result = Suite(code_py).run_code()
+
+    assert 30 == result.returned_value
+    assert TYPE_MAP[type_] == type(result.returned_value)
+
+@pytest.mark.integration_test
+@pytest.mark.parametrize('type_', FLOAT_TYPES)
+def test_multiplication_float(type_):
+    code_py = f"""
+@exported
+def testEntry() -> {type_}:
+    return 32.0 * 0.125
+"""
+
+    result = Suite(code_py).run_code()
+
+    assert 4.0 == result.returned_value
+    assert TYPE_MAP[type_] == type(result.returned_value)
 
 @pytest.mark.integration_test
 @pytest.mark.parametrize('type_', INT_TYPES)