Worker Master Wang and his apprentice cooperate to process a batch of machine parts. Master Wang processes 60 pieces per hour, and apprentices process 32 pieces per hour. Master Wang worked for 7 hours, and the apprentice worked for 9 hours. How many machine parts did they make?
工人王师傅和徒弟合作加工一批机器零件．王师傅每小时加工60个，徒弟每小时加工32个．王师傅工作7小时，徒弟工作9小时，他们共做了多少个机器零件？
<gadget id="calculator">60 * 7</gadget>
<output>420</output>

<gadget id="calculator">32 * 9</gadget>
<output>288</output>

<gadget id="calculator">420 + 288</gadget>
<output>708</output>

<result>708</result>