There is a kind of clothes in the shop, the price is 51 yuan, which is 15% cheaper than the original price, what is the original price?
商店有一种衣服，售价51元，比原来定价便宜15%，原来定价是多少元．
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">51 / (17/20)</gadget>
<output>60</output>

<result>60</result>