Sally reads 10 pages of a book on weekdays and 20 pages on weekends. If it takes 2 weeks for Sally to finish her book, how many pages that book has?
Two weeks has 5*2=
<gadget id="calculator">5*2</gadget>
<output>10</output>
10 weekdays.
Two weeks has 2*2=
<gadget id="calculator">2*2</gadget>
<output>4</output>
4 weekends.
On weekdays, she reads 10*10=
<gadget id="calculator">10*10</gadget>
<output>100</output>
100 pages in total.
On weekends, she reads 20*4=
<gadget id="calculator">20*4</gadget>
<output>80</output>
80 pages in total.
So the book has 100+80=
<gadget id="calculator">100+80</gadget>
<output>180</output>
180 pages.

<result>180</result>