Master Wang processes 10 parts in 2 hours, how many hours does it take to process one part on average.
王师傅2小时加工零件10个，平均加工一个零件需要多少小时．
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>