Problem: if the sides of a rectangle are increased by 25 % , what is the percentage increase in the area ?
Rationale: "if sides are a and b , after increase sides would be 1.25 a and 1.25 b . percentage increase in area = ( 1.25 a * 1.25 b - ab ) * 100 / ab = 56.25 % answer : b"
annotated_formula: multiply(subtract(power(add(divide(25, const_100), const_1), const_2), const_1), const_100)