A, B, and C cooperate in a batch of parts, A makes the number of the other two (1/3), B makes the number of the other two (2/5), C makes 240, How many parts are there in total?
甲、乙、丙三人合作一批零件，甲做的个数是其他两人的(1/3)，乙做的个数是其他两人的(2/5)，丙做了240个，这批零件一共多少个？
<gadget id="calculator">15 / 28</gadget>
<output>15/28 = around 0.535714</output>

<gadget id="calculator">240 / (15/28)</gadget>
<output>448</output>

<result>448</result>