batch of parts is processed. A alone can complete it in 10 days, and B alone can complete it in 15 days. After the two work together for 1 day, A makes 50 more parts than B. How many parts are there in this batch?
加工一批零件，甲单独做10天完成，乙单独做15天完成，两人合做1天后，甲比乙多做了50个零件．这批零件共有多少个？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/10) - (1/15)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">50 / (1/30)</gadget>
<output>1_500</output>

<result>1_500</result>