Uncle Zhang processes 60 parts per hour and completes it in 8 hours. He wants to complete the task 2 hours ahead of schedule, so how many parts should he machine per hour?
张叔叔每小时加工60个零件，8小时完成．他想提前2小时完成任务，那么他每小时应该加工多少个零件？
<gadget id="calculator">8 - 2</gadget>
<output>6</output>

<gadget id="calculator">8 / 6</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">60 * (4/3)</gadget>
<output>80</output>

<result>80</result>