if the digits 31 in the decimal 0.00031 repeat indefinitely , what is the value of ( 10 ^ 5 - 10 ^ 3 ) ( 0.00031 ) ?
"99 * 0.31 = 30.69 approx . 31 answer : a"
multiply(divide(multiply(multiply(multiply(10, 10), subtract(multiply(10, 10), const_1)), divide(31, subtract(multiply(10, 10), const_1))), const_1000), 10)