Li Lei weighed 36 kilograms this year, 3.5 kilograms more than last year. How many kilograms did he weigh last year?
李雷今年重36千克，比去年增加了3.5千克，他去年的体重是多少千克？
<gadget id="calculator">36 - 3.5</gadget>
<output>32.5</output>

<result>32.5</result>