The school library is going to buy two new books, one is "Encyclopedia", each set is 128 yuan; the other is "Nature Exploration", each set is 35 yuan. How much does it cost to buy 5 sets of each?
学校图书室准备购买两种新书，一种是《百科全书》，每套128元；另一种是《大自然探索》，每套35元．每种买5套，一共要花多少钱？
<gadget id="calculator">128 * 5</gadget>
<output>640</output>

<gadget id="calculator">35 * 5</gadget>
<output>175</output>

<gadget id="calculator">640 + 175</gadget>
<output>815</output>

<result>815</result>