A rectangular vegetable field is 40 meters long and 25 meters wide. If 2 kilograms of tomatoes are harvested per square meter of the vegetable field, how many kilograms of tomatoes can be harvested in this vegetable field?
一块长方形菜地，长40米，宽25米，如果每平方米菜地收西红柿2千克，这块菜地一共可收西红柿多少千克？
<gadget id="calculator">40 * 25 * 2</gadget>
<output>2_000</output>

<result>2_000</result>