Every day, Bob logs 10 hours of work in his office. If he works for five days a week, calculate the total number of hours he logs in a month.
In a week, working 10 hours a day, Bob logs 10*5 = 
<gadget id="calculator">10*5</gadget>
<output>50</output>
50 hours.
After a month with 4 weeks, Bob logs 4*50 = 
<gadget id="calculator">4*50</gadget>
<output>200</output>
200 hours for his office working hours.

<result>200</result>