4 truckloads of Chinese cabbage are shipped from the market, each truck weighs 1800kg, how many kilograms are there in total?
菜场运来4车大白菜，每车1800千克，一共有多少千克？
<gadget id="calculator">1_800 * 4</gadget>
<output>7_200</output>

<result>7_200</result>