A and B jointly produce 540 parts. After 5 hours of joint production, there are still 25 parts left to be produced. It is known that A produces 45 parts per hour, and how many parts does B produce per hour?
甲乙二人共同生产540个零件，他们共同生产了5个小时后，还差25个没生产，已知甲每小时生产45个，乙每小时生产多少个？
<gadget id="calculator">45 * 5</gadget>
<output>225</output>

<gadget id="calculator">540 - 25 - 225</gadget>
<output>290</output>

<gadget id="calculator">290 / 5</gadget>
<output>58</output>

<result>58</result>