Uncle Li’s family received 3200kg of apples this year, an increase of 25% compared to last year. How many apples did Uncle Li’s family receive last year?
李大爷家今年收苹果3200kg，比去年增产25%，李大爷家去年收多少苹果？
<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">3_200 / (5/4)</gadget>
<output>2_560</output>

<result>2_560</result>