The original price of a suit is 180 yuan, and a pair of trousers is 120 yuan. Now they are all 20% off. How much is the total price for a set of clothes?
一件西服原价180元，一条西裤120元，现在一律八折，买一套衣服共多少元？
<gadget id="calculator">180 + 120</gadget>
<output>300</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">300 * (4/5)</gadget>
<output>240</output>

<result>240</result>