The base of the flat quadrilateral lawn on the school floor is 18 meters, and the height is 6.0 decimeters. If it costs 5 yuan to pave 1 square meter of lawn, how much will it cost to pave this piece of grass?
准备在学楼面块平四边形草坪坪的底是18米，高6.分米，如果铺1平方米草坪需要5元，么铺这块草共要多少钱？
<gadget id="calculator">18 * 6.5 * 5</gadget>
<output>585</output>

<result>585</result>