and B start to make machine parts at the same time, each making 200 parts, A produces 25 per hour, when A completes the task, B still needs 2 hours to complete the task, how many parts does B produce per hour.
甲、乙两人同时开始做机器零件，各要做200个，甲每小时生产25个，当甲完成任务时，乙还需要2小时才能完成任务，乙每小时生产多少个零件．
<gadget id="calculator">200 / 25</gadget>
<output>8</output>

<gadget id="calculator">8 + 2</gadget>
<output>10</output>

<gadget id="calculator">200 / 10</gadget>
<output>20</output>

<result>20</result>