The autumn grain output of a county in the previous year was 128,000 tons, which was 30% more than the previous year. How many tons of autumn grain was produced last year?
某县前年秋粮产量为12.8万吨，去年比前年增产三成．去年秋粮产量是多少万吨？
<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">12.8 * (13/10)</gadget>
<output>16.64</output>

<result>16.64</result>