A jacket costs 135 yuan, and a pair of trousers costs 75 yuan. Mr. Wang donated 40 sets of such clothes to the students of Hope Primary School. How much is the total cost?
一件上衣需要135元，一条裤子需要75元，王先生给希望小学的学生捐助这样的衣服40套，一共需要多少元钱？
<gadget id="calculator">135 + 75</gadget>
<output>210</output>

<gadget id="calculator">210 * 40</gadget>
<output>8_400</output>

<result>8_400</result>