Xiao Ming’s house is full of flowers on a trapezoidal lot with a bottom length of 8m, an upper bottom length of 4m, and a height of 3m. If the flowers on each square meter of land sell for 300 yuan, how much can the flowers on this trapezoidal space be sold for?
小明家在一块下底长8m，上底长4m，高是3m的梯形空地上种满了鲜花，如果每平方米土地上的鲜花卖300元，这块梯形空地上的鲜花可以卖多少元？
<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>