From Sunday to Thursday, Prudence sleeps 6 hours a night.  Friday and Saturday she sleeps for 9 hours a night.  She also takes a 1-hour nap on Saturday and Sunday.  How much sleep does she get in 4 weeks?
5 nights a week she sleeps for 6 hours so she sleeps 5*6 = 
<gadget id="calculator">5*6</gadget>
<output>30</output>
30 hours
2 nights a week she sleeps for 9 hours so she sleeps 2*9 = 
<gadget id="calculator">2*9</gadget>
<output>18</output>
18 hours
2 days a week she naps for 1 hour so she sleeps 2*1 = 
<gadget id="calculator">2*1</gadget>
<output>2</output>
2 hours.
Over 1 week she sleeps 30+18+2 = 
<gadget id="calculator">30+18+2</gadget>
<output>50</output>
50 hours.
Over 4 weeks she sleeps 4*50 = 
<gadget id="calculator">4*50</gadget>
<output>200</output>
200 hours.

<result>200</result>