Xiaohong’s family grows flowers on a trapezoidal open space. The upper base of the trapezoid is 8 meters, the lower base is 4 meters, and the height is 3 meters. If the land can be sold for 300 yuan per square meter, how much can the flowers on this trapezoidal land be sold for?
小红家里在一块梯形空地上种花，梯形上底8米，下底4米，高3米，如果每平方米地可卖300元，这块梯形地上的花可以卖多少元？
<gadget id="calculator">8 + 4</gadget>
<output>12</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">12 * (3/2) * 300</gadget>
<output>5_400</output>

<result>5_400</result>