In the "Water Saving" activity in the community, Fangfang used 650 kilograms of water at home, saving 230 kilograms compared with the previous month. How many kilograms did Fangfang's family use water last month?
在小区"节约用水"活动中，芳芳家用水650千克，比上月节约了230千克．芳芳家上月用水多少千克？
<gadget id="calculator">650 + 230</gadget>
<output>880</output>

<result>880</result>