A and B process a batch of parts. The efficiency ratio between A and B is 8:5. B processes 125 pieces first, and A joins them to work together. When the task is completed, the ratio of A and B’s total work is 3:5. How many parts are there in total?
甲乙两人加工一批零件，甲、乙两人的效率比是8：5，乙先加工了125个，甲再加入一起工作，当完成任务时，甲乙工作总量的比是3：5，求这批零件一共多少个？
<gadget id="calculator">125 * 8 * 3</gadget>
<output>3_000</output>

<gadget id="calculator">125 * 8 * 5</gadget>
<output>5_000</output>

<gadget id="calculator">125 * 5 * 3</gadget>
<output>1_875</output>

<gadget id="calculator">125 * 5 * 5</gadget>
<output>3_125</output>

<gadget id="calculator">3_125 - 1_875 - 3_125</gadget>
<output>-1_875</output>

<gadget id="calculator">3_000 + 5_000 + 1_875 + (-1_875)</gadget>
<output>8_000</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">25 - 15 - 25</gadget>
<output>-15</output>

<gadget id="calculator">40 + (-15)</gadget>
<output>25</output>

<gadget id="calculator">8_000 / 25</gadget>
<output>320</output>

<result>320</result>