The master and the apprentice process a batch of parts, the apprentice first processes 240 pieces, and then the master and the apprentice work together. When the task is completed, the parts processed by the master are 40 fewer than (3/8) of this batch of tasks. The work efficiency of the master and apprentice is known. The ratio is 5:3, how many parts are there in this batch? (column solution)
师徒两人加工一批零件，徒弟先加工240个，然后师傅和徒弟共同加工，完成任务时，师傅加工的零件比这批任务的(3/8)少40个，已知师徒工作效率比是5：3，这批零件有多少个？(列式解答)
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">40 * (3/5)</gadget>
<output>24</output>

<gadget id="calculator">240 - 40 - 24</gadget>
<output>176</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(3/8) * (3/5)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">1 - (3/8) - (9/40)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">176 / (2/5)</gadget>
<output>440</output>

<result>440</result>