The production team processed a batch of parts, 720 pieces were processed in 6 days, and the task was completed after another 15 days at this speed. How many parts are there in total?
生产小组加工一批零件，6天加工了720个，照这样的速度又加工了15天，便完成了任务，这批零件共有多少个？
<gadget id="calculator">720 / 6</gadget>
<output>120</output>

<gadget id="calculator">120 * 15</gadget>
<output>1_800</output>

<gadget id="calculator">1_800 + 720</gadget>
<output>2_520</output>

<result>2_520</result>