The price of a product after a 30% discount is 63 yuan, what is the original price?
一件商品打七折后的价格是63元，原价是多少元．
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">63 / (7/10)</gadget>
<output>90</output>

<result>90</result>