if a tire rotates at 400 revolutions per minute when the car is traveling 168 km / h , what is the circumference of the tire ?
"400 rev / minute = 400 * 60 rev / 60 minutes = 24,000 rev / hour 24,000 * c = 168,000 m : c is the circumference c = 3 meters correct answer a"
multiply(divide(168, multiply(multiply(multiply(const_2, const_3), const_10), 400)), const_1000)