sand is poured into a box so that the box is being filled at the rate of 4 cubic feet per hour . if the empty rectangular box is 7 feet long , 6 feet wide , and 2 feet deep , approximately how many hours does it take to fill the box ?
n0 = 4.0
n1 = 7.0
n2 = 6.0
n3 = 2.0
t0 = n1 * n2
t1 = n3 * t0
answer = t1 / n0
print(answer)