The total amount of green vegetables in a county last year was 7.2 million kilograms, which is less than this year (1/10). How much is the total output of green vegetables in the county this year? (solution by equation)
一个县去年绿色蔬菜总量720万千克，比今年少了(1/10)．今年县绿色蔬菜总产量是多少万千克？(用方程解)
<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>