Problem: if 5 machines can produce 20 units in 10 hours , how long would it take 25 to produce 100 units ?
Rationale: "5 machines would produce 100 units in 50 hours . increasing the amount of machines by 5 would mean dividing 50 hours by 5 . 50 / 5 = 10 answer : d"
annotated_formula: divide(100, multiply(divide(divide(20, 10), 5), 20))