Uncle Wang’s family harvested 4,800 kilograms of rice this year, which is 1/4 more than last year. How many kilograms of rice were harvested last year?
王大爷家今年收稻谷4800千克，比去年增产(1/4)，去年收稻谷多少千克？
<gadget id="calculator">1 / 4</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_800 / (5/4)</gadget>
<output>3_840</output>

<result>3_840</result>