Uncle Li bought a top and a pair of trousers for a total of 544 yuan. The top was 30% off and the trousers were 20% off. The price of the top was 400 yuan. How much is the price of the trousers? (solution by equation)
李叔叔买了一件上衣和一条裤子，共544元，其中上衣打了7折，裤子打了8折，上衣标价400元，则裤子标价多少钱？(用方程解)
<gadget id="calculator">400 * 0.7</gadget>
<output>280</output>

<gadget id="calculator">544 - 280</gadget>
<output>264</output>

<gadget id="calculator">264 / 0.8</gadget>
<output>330</output>

<result>330</result>