There is a parallelogram steel plate with a base of 4 meters and a height of 5 meters. If it weighs 12 kilograms per square meter, how many kilograms does this steel plate weigh?
有一块平行四边形的钢板，底是4米，高是5米，如果每平方米重12千克，这块钢板重多少千克？
<gadget id="calculator">4 * 5 * 12</gadget>
<output>240</output>

<result>240</result>