The two masters and apprentices jointly processed 1200 parts, and (4/5) of all tasks have been completed, and (5/8) of them are processed by the master. How many parts has the master processed?
师徒两人共同加工1200个零件，已经完成了全部任务的(4/5)，其中的(5/8)是师傅加工的．师傅已经加工了多少个零件？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1_200 * (4/5) * (5/8)</gadget>
<output>600</output>

<result>600</result>