The school bought 8 pairs of badminton rackets, each pair of b yuan, Mr. Zhang paid the salesperson 200 yuan, how much should be recovered.
学校买来羽毛球拍8副，每副b元，张老师付给售货员200元，应找回多少元．
<gadget id="calculator">200 - 8</gadget>
<output>192</output>

<result>192</result>