Problem: if the side length of square b is sqrt ( 5 ) times that of square a , the area of square b is how many times the area of square a ?
Rationale: "let x be the side length of square a . then the area of square a is x ^ 2 . the area of square b is ( sqrt ( 5 ) x ) ^ 2 = 5 x ^ 2 . the answer is e ."
annotated_formula: power(sqrt(5), const_2)