The garment factory processes a batch of tops, and the original plan is to complete the task within 20 days. Actually, 60 more pieces are processed every day than planned. After doing this for 15 days, the number of pieces exceeded the plan by 350, which is how many coats were originally planned to be processed.
服装厂加工一批上衣，原计划20天完成任务．实际每天比计划多加工60件．照这样做了15天，就超过计划件数350件，原计划加工上衣多少件．
<gadget id="calculator">350 / 15</gadget>
<output>70/3 = around 23.333333</output>

<gadget id="calculator">60 - (70/3)</gadget>
<output>110/3 = around 36.666667</output>

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

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/15) - (1/20)</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(110/3) / (1/60)</gadget>
<output>2_200</output>

<result>2_200</result>