Hey with that question you multiply the number in the Parentheses with the exponent, once you do that to each number multiply the two numbers together.
convert the feet to inches
1 foot = 12 inches
so 1.5 ft =1.5*12 = 18 inches
now multiply all 3
14*18*7 = 1764 cubic inches
1000 times cause its the value of the number
-8 if you search it just use calculater