Last year, Lijia Village produced 2.07 tons of rice per hectare, an increase of 15% compared with the previous year. How many tons of rice per hectare were produced in the previous year?
李家村去年每公顷农田产水稻2.07吨，比前年增产一成五，前年每公顷产水稻多少吨？
<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">2.07 / (23/20)</gadget>
<output>1.8</output>

<result>1.8</result>