and B start to process a batch of parts at the same time, and each person processes half of the total number of parts. When A completes 1/3 of the task, B processes 50 parts, and when A completes 3/5, B completes half. Q: How many parts are there in this batch?
甲、乙二人同时开始加工一批零件，每人加工零件总数的一半，甲完成任务的1/3时乙加工了50个零件，甲完成3/5时乙完成了一半．问：这批零件共多少个？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/5) / (1/2)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(6/5) / (1/3)</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">50 * (18/5) * 2</gadget>
<output>360</output>

<result>360</result>