A kind of leather shoes first raises the price by 20%, and then reduces the price by 20%. The price is 120 yuan. What is the original price?
一种皮鞋先提价20%，后又降价20%，售价是120元，原价是多少元．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">120 / (4/5) / (6/5)</gadget>
<output>125</output>

<result>125</result>