Hongxing Village produced 23 tons of wheat last year, an increase of 15% over the previous year. How many tons of wheat were there in the previous year?
红星村去年产小麦23吨，比前年增产一成五，前年小麦多少吨？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">23 / (23/20)</gadget>
<output>20</output>

<result>20</result>