The current price of a coat is 100 yuan, which is the original price (4/5). How much is the original price?
一件上衣现价是100元，是原价的(4/5)，原价是多少元？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">100 / (4/5)</gadget>
<output>125</output>

<result>125</result>