Workers A, B, and C work together to process a batch of parts. A completes (1/5) of the total number, and the rest is distributed to B and C according to 7:5. It is known that B produces 8 more parts than A. How many parts did A process?
甲、乙、丙三个工人共同加工一批零件，甲完成了总数的(1/5)，剩下的按7：5分配给乙和丙，已知乙比甲多生产8个零件．甲加工了多少个零件？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">(4/5) * (7/12)</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">(7/15) - (1/5)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">8 / (4/15)</gadget>
<output>30</output>

<gadget id="calculator">30 * (1/5)</gadget>
<output>6</output>

<result>6</result>