A parallelogram-shaped open space, with a base of 25 meters and a height of 16 meters, needs to be paved with lawn. If the lawn costs 42 yuan per square meter, how much is the total cost?
一块平行四边形空地，底是25米，高是16米，要铺上草坪，如果每平方米草坪需要42元，一共需要多少元？
<gadget id="calculator">25 * 16 * 42</gadget>
<output>16_800</output>

<result>16_800</result>