Jianshe Township planted 4.4 million trees this year, an increase of 10% over last year. How many thousands of trees were planted last year?
建设乡今年植树440万棵，比去年增加了10%，去年植树多少万棵？
<gadget id="calculator">10 / 100</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">440 / (11/10)</gadget>
<output>400</output>

<result>400</result>