Harry is counting the hours that he sleeps. On Monday night, he sleeps for 8 hours. On Tuesday night, he sleeps for 7 hours. On Wednesday night, he sleeps for 8 hours. On Thursday night, he sleeps for 10 hours. On Friday night he sleeps for 7 hours. What is the average number of hours that Harry sleeps in one night?
Across Monday through Friday, the total number of hours Harry sleeps is 8 + 7 + 8 + 10 + 7 = 
<gadget id="calculator">8+7+8+10+7</gadget>
<output>40</output>
40 hours.
The total number of days from Monday through Friday is 
<gadget id="calculator">5</gadget>
<output>5</output>
5 days.
The average number of hours Harry sleeps in one night is 40 / 5 = 
<gadget id="calculator">40/5</gadget>
<output>8</output>
8 hours.

<result>8</result>