The school went to the market to buy 23 tape recorders, each recording was 299 yuan, and the salesperson was paid 7,500 yuan. How much should I get back?
学校去市场购买23台录音机，每台录音299元，付给售货员7500元，应找回多少钱？
<gadget id="calculator">299 * 23</gadget>
<output>6_877</output>

<gadget id="calculator">7_500 - 6_877</gadget>
<output>623</output>

<result>623</result>