A parallelogram-shaped vegetable field has a base of 30 meters and a height of 15 meters. On average, 9 kilograms of vegetables can be harvested per square meter. How many kilograms of vegetables can be harvested in this field?
一块平行四边形的菜地底是30米，高是15米，平均每平方米收蔬菜9千克，这块地可以收蔬菜多少千克？
<gadget id="calculator">30 * 15 * 9</gadget>
<output>4_050</output>

<result>4_050</result>