The total output of green vegetables in a county in the previous year was 720 tons, which was 1/10 less than last year. How many tons was the total output of green vegetables in the county last year?
一个县前年绿色蔬菜总产量是720吨，比去年少(1/10)，去年全县绿色蔬菜总产量是多少吨？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">720 / (9/10)</gadget>
<output>800</output>

<result>800</result>