Four people, A, B, C, and D, jointly produce a batch of parts. A’s production accounts for 2/13 of the other three’s total, B’s production accounts for 1/4 of the other three’s total, and C’s production accounts for the other three’s total. The total number of three people (4/11), it is known that D produced 60 parts, so how many parts A, B, and C produced in total.
甲、乙、丙、丁四个人共同生产一批零件，甲生产的占其他三人总数的(2/13)，乙生产的占其他三人总数的(1/4)，丙生产的占其他三人总数的(4/11)，已知丁生产了60个，那么甲、乙、丙三人共生产零件多少个．
<gadget id="calculator">13 + 2</gadget>
<output>15</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">11 + 4</gadget>
<output>15</output>

<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">1 - (2/15) - (1/5) - (4/15)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">60 / (2/5)</gadget>
<output>150</output>

<gadget id="calculator">150 - 60</gadget>
<output>90</output>

<result>90</result>