set of desks and chairs for two people costs 220 yuan. There are 56 students in our class. How much does it cost to buy such desks and chairs?
一套双人课桌椅要220元，我们班有56个人，购买这样的课桌椅一共需要多少钱？
<gadget id="calculator">56 / 2</gadget>
<output>28</output>

<gadget id="calculator">28 * 220</gadget>
<output>6_160</output>

<result>6_160</result>