Li Qiang weighs 33 kilograms, 10% more than last year. How many kilograms did he weigh last year?
李强体重33千克，比去年增加10%，去年他的体重是多少千克？
<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">33 / (11/10)</gadget>
<output>30</output>

<result>30</result>