The canteen originally had 2,500 kilograms of rice, and bought 18 bags of rice, each bag 80 kilograms. How many kilograms of rice are there in total now?
食堂原有大米2500千克，又买来18袋大米，每袋80千克．现在一共有大米多少千克？
<gadget id="calculator">18 * 80</gadget>
<output>1_440</output>

<gadget id="calculator">2_500 + 1_440</gadget>
<output>3_940</output>

<result>3_940</result>