if 8 workers can build 8 cars in 8 days , then how many days would it take 6 workers to build 6 cars ?
"8 workers can build 1 car per day on average . 1 worker can build 1 / 8 of a car per day . 6 workers can build 6 / 8 car per day . the time required to build 6 cars is 6 / ( 6 / 8 ) = 8 days the answer is d ."
multiply(divide(multiply(8, 8), 8), divide(6, 6))