James writes from 1 PM to 4 PM every night.  He can write 5 pages per hour.  How many weeks will it take to finish his 735-page book?
He writes for 4-1=
<gadget id="calculator">4-1</gadget>
<output>3</output>
3 hours per day.
That means he writes 3*5=
<gadget id="calculator">3*5</gadget>
<output>15</output>
15 pages per day.
So it would take him 735/15=
<gadget id="calculator">735/15</gadget>
<output>49</output>
49 days.
That means it will take 49/7=
<gadget id="calculator">49/7</gadget>
<output>7</output>
7 weeks.

<result>7</result>