I gained weight again, and now I weigh 44.2 kilograms, an increase of 0.9 kilograms from last month. How many kilograms did Ding Ding weigh last month?
我又长胖了，现在有44.2千克，比上个月增加了0.9千克．丁丁上个月重多少千克？
<gadget id="calculator">44.2 - 0.9</gadget>
<output>43.3</output>

<result>43.3</result>