Tom hasn't been sleeping well lately. He figures he has been getting about 5 hours of sleep each weeknight and 6 hours each night on the weekend. If Tom would ideally like to get 8 hours of sleep each night on both weeknights and weekends, how many hours of sleep is Tom behind on from the last week?
Tom ideally wants to sleep 8 hours a night for 7 days, 8 x 7 = 
<gadget id="calculator">8*7</gadget>
<output>56</output>
56 hours sleep total for the week.
Tom has actually only slept 5 hours each weeknight, 5 x 5 = 
<gadget id="calculator">5*5</gadget>
<output>25</output>
25 hours of sleep.
Tom has only slept 6 hours each night on the weekend, 6 x 2 = 
<gadget id="calculator">6*2</gadget>
<output>12</output>
12 hours of sleep.
Total, Tom has gotten 25 + 12 hours = 
<gadget id="calculator">25+12</gadget>
<output>37</output>
37 hours sleep.
The difference between how many hours Tom would like to sleep, 56, and how many hours he's actually slept, 37, is 56 - 37 = 
<gadget id="calculator">56-37</gadget>
<output>19</output>
19 hours of sleep that Tom is behind on.

<result>19</result>