The upper base of a trapezoidal land is 40m, the lower base is 60m, and the height is 64m. If it is drawn on a drawing with a scale of 1:2000, what is the area of the land on the drawing?
一块梯形地的上底是40m，下底是60m，高是64m，如果将它画在比例尺为1：2000的图纸上，这块地在图纸上的面积上的面积是多少平方厘米？
<gadget id="calculator">1 / 2_000</gadget>
<output>1/2_000 = around 0.0005</output>

<gadget id="calculator">40 * 100 * (1/2_000)</gadget>
<output>2</output>

<gadget id="calculator">60 * 100 * (1/2_000)</gadget>
<output>3</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">(1/2_000) / 2</gadget>
<output>1/4_000 = around 0.00025</output>

<gadget id="calculator">5 * 64 * 100 * (1/4_000)</gadget>
<output>8</output>

<result>8</result>