The apprentice processes 48 parts per hour. The number of parts he can process in 5 hours can be completed by the master in only 4 hours. How many parts does the master process per hour?
徒弟每小时加工48个零件，他5小时加工好的零件个数，师傅只需要4小时就能完成，师傅每小时加工零件多少个？
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">48 * (5/4)</gadget>
<output>60</output>

<result>60</result>