Master Li needs to process a batch of parts. If 50 parts are processed per hour, the processing can be completed in 6 hours. If 60 pieces are processed per hour, how many hours can the processing be completed? (Solve with ratio)
李师傅要加工一批零件，如果每小时加工50个，6小时可以加工完．若每小时加工60个，多少小时可以加工完？(用比例解)
<gadget id="calculator">50 * 6</gadget>
<output>300</output>

<gadget id="calculator">300 / 60</gadget>
<output>5</output>

<result>5</result>