A triangular land with a base of 15 meters and a height of 8.4 meters is full of flowers, and the flowers can be sold for an average of 300 yuan per square meter of land. How much can the flowers of this land be sold for in total?
一块底15米，高8.4米的三角形地种满了鲜花，平均每平方米地的鲜花能卖300元，这块地的鲜花一共能卖多少元？
<gadget id="calculator">8.4 / 2</gadget>
<output>4.2</output>

<gadget id="calculator">15 * 4.2</gadget>
<output>63</output>

<gadget id="calculator">300 * 63</gadget>
<output>18_900</output>

<result>18_900</result>