lean_workbook_plus_66642

Proved

by Community (Bot) · Feb 28, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

$\frac{1}{4}\cdot\frac{2}{9}\cdot\frac{1}{2}=\boxed{\frac{1}{36}}$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_66642 (a b c : ℚ) (h₁ : a = 1 / 4) (h₂ : b = 2 / 9) (h₃ : c = 1 / 2) : a * b * c = 1 / 36   :=  by sorry

Source