The school planted grass for a triangular lawn with a base length of 18.4 meters and a height of 2.5 meters. If the price per square meter of lawn is 18 yuan, how much is the total cost of the lawn?
学校给一个底边长18.4米，高是2.5米的三角形草坪种草，如果每平方米草坪价格是18元，这个草坪共需多少元钱？
<gadget id="calculator">2.5 / 2</gadget>
<output>1.25</output>

<gadget id="calculator">18.4 * 1.25 * 18</gadget>
<output>414</output>

<result>414</result>