The school cafeteria bought 2500kg of rice, ate 1100kg a week, and bought another 900kg. How many kilograms of rice is there in the school cafeteria now?
学校食堂购进大米2500千克，一个星期吃了1100千克，又购进900千克．现在学校食堂有大米多少千克？
<gadget id="calculator">2_500 - 1_100</gadget>
<output>1_400</output>

<gadget id="calculator">1_400 + 900</gadget>
<output>2_300</output>

<result>2_300</result>