The actual afforestation area of Qingshan Forest Farm this year is 2,100 square meters, which is 600 square meters more than the planned afforestation.
青山林场今年实际造林2100平方米，比计划造林多600平方米，今年实际造林比原计划增加百分之几？
<gadget id="calculator">2_100 - 600</gadget>
<output>1_500</output>

<gadget id="calculator">600 / 1_500</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>