In the middle of the road there is a triangular lawn 20 meters long and 18 meters high. If the price of 1m**2 lawn is 12 yuan, how much does it cost to grow this lawn?
在公路中间有一块三角形草坪长20米，高18米．如果1m**2草坪的价格是12元，种这块草坪需要多少钱？
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">20 * 9 * 12</gadget>
<output>2_160</output>

<result>2_160</result>