On the labor base of Hope Primary School, the original plan was to plant 21,600 saplings in 12 days, but 360 more saplings were actually planted per day than originally planned. How many days did it take to actually complete the planting task?
在希望小学的劳动基地上，原计划用12天栽21600棵树苗，实际每天比原计划多栽360棵．实际完成栽种任务用了多少天？
<gadget id="calculator">21_600 / 12</gadget>
<output>1_800</output>

<gadget id="calculator">1_800 + 360</gadget>
<output>2_160</output>

<gadget id="calculator">21_600 / 2_160</gadget>
<output>10</output>

<result>10</result>