The output of autumn grain in a certain province in the previous year was 1.56 million tons, which was 20% higher than that of the previous year last year. How many tons of autumn grain was produced last year?
某省前年秋粮产量为156万吨，去年比前年增产二成，去年秋粮产量是多少万吨？
<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">156 * (6/5)</gadget>
<output>936/5 = around 187.2</output>

<result>936/5 = around 187.2</result>