For a contest, Dominique is stacking 3 super-long pens lengthwise on top of each other. Each pen is 2 feet long. If she succeeds, how many inches tall will her stack of pens be?
The stack of pens would be 72 inches tall. Each pen is two feet and there are three of them. Every foot has 12 inches. Multiply 12*2=24. Then multiply that by 3. so 24*3=72in
