Uncle Wang’s family harvested 4,400 kilograms of rice this year, an increase of 25% over last year. How many kilograms of rice were harvested last year?
王大爷家今年收稻谷4400千克，比去年增产25%，去年收稻谷多少千克？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">4_400 / (5/4)</gadget>
<output>3_520</output>

<result>3_520</result>