Master Zhang needs to process a batch of machine parts. He processed 60 pieces in the first 3 hours. At this speed, he can complete the task in another 6 hours. How many machine parts does he have to process in total?
张师傅要加工一批机器零件，前3小时加工了60个，照这样的速度，再加工6小时就能完成任务，他一共要加工多少个机器零件？
<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<gadget id="calculator">20 * 6</gadget>
<output>120</output>

<gadget id="calculator">60 + 120</gadget>
<output>180</output>

<result>180</result>