Last year's cotton production in Xingfu Township increased by 30% compared to the previous year. Last year's cotton production was 247 tons. How many tons was the cotton production in the previous year?
幸福乡去年的棉花产量比前年增加三成，去年的棉花产量是247吨，前年的棉花产量是多少吨？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 + (3/10)</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">247 / (13/10)</gadget>
<output>190</output>

<result>190</result>