A and B work together to make 377 parts, and the cooperation is completed in 6.5 hours. A makes 12 more parts per hour than B. How many parts does B make per hour?
甲乙两人合做377个零件，合作6.5小时正好完成，甲每小时比乙多做12个，乙每小时做了多少个零件？
<gadget id="calculator">377 / 6.5</gadget>
<output>58</output>

<gadget id="calculator">58 - 12</gadget>
<output>46</output>

<gadget id="calculator">46 / 2</gadget>
<output>23</output>

<result>23</result>