find the sum the difference between the compound and s . i . on a certain sum of money for 4 years at 20 % per annum is rs . 50 of money ?
"p = 50 ( 100 / 20 ) 4 = > p = 1000 answer : a"
multiply(multiply(divide(50, multiply(20, 4)), const_100), multiply(20, 4))