The farm produces 280 tons of wheat this year, which is 1/4 more than last year. How many tons of wheat was produced last year?
农场今年产小麦280吨，比去年增产(1/4)，去年产小麦多少吨？
<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">280 / (5/4)</gadget>
<output>224</output>

<result>224</result>