Uncle Li’s family grows wheat every year. This year’s output is 3,520 kilograms, which is 10% more than last year’s. What was the output of last year’s wheat?
李大伯家的一块地每年种植小麦，今年产量是3520千克，比去年增产一成，去年小麦产量是多少．
<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">3_520 / (11/10)</gadget>
<output>3_200</output>

<result>3_200</result>