A 20% discount for a product is 56 yuan, how much is the original price.
一件商品打八折是56元，原价是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">56 / (4/5)</gadget>
<output>70</output>

<result>70</result>