A pair of trousers is 49 yuan, and the price of a jacket is twice the price of a pair of trousers. How much does it cost to buy such a suit?
一条裤子49元，一件上衣的价钱是一条裤子价钱的2倍．买这样一套衣服，需要多少钱？
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">49 * 3</gadget>
<output>147</output>

<result>147</result>