find the simple interest on $ 10000 at 8 % per annum for 12 months ?
"p = $ 10000 r = 8 % t = 12 / 12 years = 1 year s . i . = p * r * t / 100 = 10000 * 8 * 1 / 100 = $ 800 answer is d"
multiply(10000, divide(8, const_100))