Xiaohong weighs 38.5 kilograms this year, which is 10% more than last year. How many kilograms did she weigh last year?
小红今年重38.5千克，比去年增加了10%，她去年的体重是多少千克？
<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">38.5 / (11/10)</gadget>
<output>35</output>

<result>35</result>