Xingshan Orchard harvested 22,000 kilograms of apples this year, an increase of 10% compared to last year. How many kilograms of apples were harvested last year?
杏山果园今年收获苹果22000千克，比去年增长了一成，去年收获苹果多少千克？
<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">22_000 / (11/10)</gadget>
<output>20_000</output>

<result>20_000</result>