triangular piece of land with a base of 18 meters and a height of 15 meters. If you want to pave the floor with tiles, you need to spend 60 yuan per square meter. How much is the total cost?
一块三角形地，底18米，高15米．如果要铺成花砖地面，每平方米需要用60元，一共要多少元？
<gadget id="calculator">15 / 2</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">18 * (15/2) * 60</gadget>
<output>8_100</output>

<result>8_100</result>