The grain station has 2,800 kilograms of rice and 1,200 kilograms of flour, and 80 bags of rice, each bag of 50 kilograms, how many kilograms of rice are there now?
粮站有2800千克大米和1200千克面粉，又运来80袋大米，每袋50千克，现在一共有大米多少千克？
<gadget id="calculator">80 * 50</gadget>
<output>4_000</output>

<gadget id="calculator">2_800 + 4_000</gadget>
<output>6_800</output>

<result>6_800</result>