Reese has been practicing piano for four hours every week. How many hours will he practice after five months?
If Reese practices 4 four hours every week, in a month, with four weeks, he would have practiced for 4*4 = 
<gadget id="calculator">4*4</gadget>
<output>16</output>
16 hours.
In five months, Reese would have practiced for 5*16 = 
<gadget id="calculator">5*16</gadget>
<output>80</output>
80 hours.

<result>80</result>