A rectangular piece of land is 60 meters long and 40 meters wide. If you harvest 2 kilograms of wheat per square meter, how many kilograms of wheat can you harvest in total on this piece of land?
一块长方形地，长60米，宽40米，如果每平方米收小麦2千克，这块地一共可收小麦多少千克？
<gadget id="calculator">60 * 40 * 2</gadget>
<output>4_800</output>

<result>4_800</result>