The height of a parallelogram vegetable field is 15 meters, and the bottom is 30 meters. If each square meter of vegetable field harvests 20.6 kilograms of vegetables a year, how many kilograms of vegetables does this vegetable field harvest in a year?
一块平行四边形菜地高是15米，底是30米，如果每平方米的菜地一年收蔬菜20.6千克，这块菜地一年收蔬菜多少千克？
<gadget id="calculator">30 * 15 * 20.6</gadget>
<output>9_270</output>

<result>9_270</result>