A factory originally planned to have an annual output value of 20 million yuan, but it turned out to have an annual output value of 24 million yuan. How much is the actual overproduction?
某工厂原计划年产值达到2000万元，结果年产值达2400万元，实际超产多少
<gadget id="calculator">2_400 - 2_000</gadget>
<output>400</output>

<gadget id="calculator">400 / 2_000</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>