Guangming Plastic Factory produced 2,400 tons of agricultural film in the first quarter of this year, a 20% increase in production compared to the original plan. How many tons did it increase?
光明塑料厂今年第一季度生产农用薄膜2400吨，比原计划增产20%，增产了多少吨？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">2_400 / (6/5)</gadget>
<output>2_000</output>

<gadget id="calculator">2_400 - 2_000</gadget>
<output>400</output>

<result>400</result>