the length of a rectangle is doubled while its width is doubled . what is the % change in area ?
"the original area is l * w the new area is 2 l * 2 w = 4 * l * w = l * w + 3 * l * w the area increased by 300 % . the answer is b ."
multiply(subtract(multiply(const_2, const_3), const_1), const_10)