Xiao Min's family collected 2,200 kilograms of rice this year, an increase of 10% compared to last year. How many kilograms of rice did they collect last year?
小敏家今年收大米2200千克，比去年增长了一成，去年收大米多少千克？
<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_200 / (11/10)</gadget>
<output>2_000</output>

<result>2_000</result>