Sanmao bought 4 homework books for 2 yuan. When the unit price of homework books drops to half of the original price, how many homework books can Sanmao buy with 8 yuan?
三毛用2元钱买了4本作业本，当作业本的单价降到原来的一半时，三毛用8元钱可以买多少本作业本．
<gadget id="calculator">2 / 4 / 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">8 / (1/4)</gadget>
<output>32</output>

<result>32</result>