find the sum of first 20 natural numbers
"explanation : sum of n natural numbers = n ( n + 1 ) / 2 = 20 ( 20 + 1 ) / 2 = 20 ( 21 ) / 2 = 210 answer : option b"
add(divide(divide(20, divide(divide(divide(divide(divide(20, const_2), const_2), const_2), const_2), const_2)), const_2), add(const_1, sqrt(divide(divide(20, divide(divide(divide(divide(divide(20, const_2), const_2), const_2), const_2), const_2)), const_2))))