The steel mill plans to produce 550,000 tons of steel this year, an increase of 25% over last year. How many tons of steel was produced last year?
钢厂今年计划产钢55万吨，比去年增产25%，去年产钢多少万吨？
<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">55 / (5/4)</gadget>
<output>44</output>

<result>44</result>