A pair of trousers costs 78 yuan, and a pair of leather shoes costs three times that of the trousers. How much does it cost Dad to buy a pair of such trousers and a pair of leather shoes?
一条裤子78元，一双皮鞋的价钱是裤子的3倍，爸爸买一条这样的裤子配一双皮鞋，共需要多少钱？
<gadget id="calculator">78 * 3</gadget>
<output>234</output>

<gadget id="calculator">78 + 234</gadget>
<output>312</output>

<result>312</result>