Bob wants to dig a hole 6 feet long by 4 feet wide by 3 feet deep. If it takes him 3 seconds to shovel a cubic foot of earth, how long will it take him to dig the hole?
The hole is 6 feet long by 4 feet wide by 3 feet deep or 6 * 4 * 3 = 
<gadget id="calculator">6*4*3</gadget>
<output>72</output>
72 cubic feet.
Bob shovels a cubic foot of earth every 3 seconds so it will take 72 * 3 = 
<gadget id="calculator">72*3</gadget>
<output>216</output>
216 seconds to dig the hole.

<result>216</result>