Master Zhang needs to process a batch of parts, 20 parts per hour, which can be completed in 6 hours. If processing 24 per hour, how many hours can be completed.
张师傅要加工一批零件，每小时加工20个，6小时可以完成．如果每小时加工24个，多少小时可以完成．
<gadget id="calculator">6 / 24</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 * (1/4)</gadget>
<output>5</output>

<result>5</result>