Problem: a sum of 13,400 amounts to 14,400 in 2 years at the rate of simple interest . what is the rate of interest ?
Rationale: "d 4 % s . i . = ( 14400 - 13400 ) = 1000 . rate = ( 100 x 1000 ) / ( 13400 x 2 ) % = 4 %"
annotated_formula: multiply(divide(divide(const_3, 2), add(multiply(const_3, 2), add(const_0_25, const_0_25))), const_100)