and B process a batch of parts at the same time. When completing the task, A makes (5/8) of all the parts, and B processes 12 parts per hour. It takes 12 hours for A to process this batch of parts alone. This batch of parts has how many?
甲、乙两人同时加工一批零件，完成任务时，甲做了全部零件的(5/8)，乙每小时加工12个零件，甲单独加工完成这批零件要12小时，这批零件有多少个？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(5/8) / (3/8)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">12 * (5/3) * 12</gadget>
<output>240</output>

<result>240</result>