Hualian Commercial Building offers a 10% discount on all products. Customers buy a pair of leather shoes for 180 yuan. How much is the original price of this pair of leather shoes?
华联商厦优惠活动，所有商品一律打九折出售，顾客买一双皮鞋用去180元，这双皮鞋原价多少元？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">180 / (9/10)</gadget>
<output>200</output>

<result>200</result>