The price of a schoolbag after a 20% discount is 32 yuan, how much is the original price.
一个书包打八折后的价钱是32元，原价多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">32 / (4/5)</gadget>
<output>40</output>

<result>40</result>