The total output of green vegetables in Hongxing Village this year is 96.6 tons, an increase of 15% over last year. How many tons was the total output of green vegetables last year? (column equation solution)
红星村今年绿色蔬菜总产量是96.6吨，比去年增产了15%．去年绿色蔬菜总产量是多少吨？(列方程解答)
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">96.6 / (5/4)</gadget>
<output>77.28</output>

<result>77.28</result>