A factory plans to have an output value of 6 million yuan this year, an increase of 20% over last year. How much is the increase in production this year compared to last year?
某厂计划今年的产值是600万元，比去年增产20%，今年比去年增产多少万元？
<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">600 / (6/5)</gadget>
<output>500</output>

<gadget id="calculator">600 - 500</gadget>
<output>100</output>

<result>100</result>