The total wheat output of a county this year is 550,000 tons, an increase (1/10) compared to last year. What was the total wheat output of the county last year?
一个县今年小麦总产量是55万吨，比去年增产(1/10)，去年全县的小麦总产量是多少万吨？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">55 / (11/10)</gadget>
<output>50</output>

<result>50</result>