John reads his bible every day.  He reads for 2 hours a day and reads at a rate of 50 pages an hour.  If the bible is 2800 pages long how many weeks will it take him to read it all?
He reads 2*50=
<gadget id="calculator">2*50</gadget>
<output>100</output>
100 pages a day.
So he reads 7*100=
<gadget id="calculator">7*100</gadget>
<output>700</output>
700 pages a week.
So it takes 2800/700=
<gadget id="calculator">2800/700</gadget>
<output>4</output>
4 weeks.

<result>4</result>