A chemical fertilizer factory produced 3,000 tons of fertilizer last year, which was 20% more than the previous year. How many tons were produced in the previous year?
某化肥厂去年产的化肥是3000吨，去年比前年增产20%，前年生产多少吨．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">3_000 / (6/5)</gadget>
<output>2_500</output>

<result>2_500</result>