A pair of trousers is 80 yuan, which is less than the price of the jacket (1/5). How much is such a set of clothes?
一件裤子80元，比上衣的价钱少(1/5)，这样的一套衣服多少元？
<gadget id="calculator">1 / 5</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">80 / (4/5)</gadget>
<output>100</output>

<gadget id="calculator">100 + 80</gadget>
<output>180</output>

<result>180</result>