The two masters and apprentices worked together to complete 360 parts in 9 days. It is known that the master makes 28 parts every day, how many parts does the apprentice make every day? (solution by equation)
师徒两人合作完成360个零件，9天完工，已知师傅每天做28个，徒弟每天做多少个？(用方程解)
<gadget id="calculator">28 * 9</gadget>
<output>252</output>

<gadget id="calculator">360 - 252</gadget>
<output>108</output>

<gadget id="calculator">108 / 9</gadget>
<output>12</output>

<result>12</result>