Uncle Wang's apple production this year is 2.2 tons, which is 10% more than last year's production. How many kilograms is the increase in production this year compared to last year?
王大爷家今年苹果产量为2.2吨，比去年产量增产一成．今年比去年增产多少千克？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">2.2 / (11/10)</gadget>
<output>2</output>

<gadget id="calculator">2.2 - 2</gadget>
<output>0.2</output>

<result>0.2</result>