A commodity sold at a 10% discount is 45 yuan, how much is the original price?
一种商品以九折出售是45元，原价多少元？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">45 / (9/10)</gadget>
<output>50</output>

<result>50</result>