Each set of desks costs 160 yuan. Guangming Primary School bought 170 sets of desks, and Xinya Primary School bought 400 sets of desks. How much less does Guangming Primary School cost than Xinya Primary School?
每套课桌160元，光明小学共买了170套课桌，新亚小学共买了400套课桌．光明小学比新亚小学少花多少钱？
<gadget id="calculator">400 * 160</gadget>
<output>64_000</output>

<gadget id="calculator">170 * 160</gadget>
<output>27_200</output>

<gadget id="calculator">64_000 - 27_200</gadget>
<output>36_800</output>

<result>36_800</result>