Master Wang has to make 800 parts, 746 of which have already been made, and the rest will take 6 hours to finish. How many parts are made per hour on average?
王师傅要做800个零件，已经做了746个，剩下的要6小时做完，平均每小时做多少个？
<gadget id="calculator">800 - 746</gadget>
<output>54</output>

<gadget id="calculator">54 / 6</gadget>
<output>9</output>

<result>9</result>