The grain output of a certain farm this year is 1000 tons, which is 25% more than last year. How many tons of grain was produced last year?
某农场今年粮食产量是1000吨，比去年增产25%，去年粮食产量是多少吨
<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">1_000 / (5/4)</gadget>
<output>800</output>

<result>800</result>