It takes 3 days to process a batch of parts, and it takes 4 days for B to complete it alone. When two people process at the same time, when the task is completed, A makes 24 more parts than B. How many parts are there in this batch?
加工一批零件，甲独做需3天完成，乙独做需4天完成，两人同时加工，完成任务时，甲比乙多做24个．这批零件共有多少个？
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">24 / 1</gadget>
<output>24</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">24 * 7</gadget>
<output>168</output>

<result>168</result>