Xiaomi weighs 27 kilograms this year. He weighed 3 kilograms more than last year. How many kilograms did he weigh last year?
小米今年重27千克，他比去年重了3千克，去年重多少千克？
<gadget id="calculator">27 - 3</gadget>
<output>24</output>

<result>24</result>