An approximately trapezoidal cotton field. The upper bottom is 6.4 meters long, 0.2 meters shorter than the lower bottom, and the upper bottom is twice as high. If each cotton plant occupies an area of 0.8 square decimeters, how many cotton plants can be planted in this field?
一个近似梯形的棉花田．上底长6.4米，比下底短0.2米，上底是高的2倍，如果每株棉花占地0.8平方分米，这块田可栽多少株棉花？
<gadget id="calculator">6.4 + 6.4 + 0.2</gadget>
<output>13</output>

<gadget id="calculator">6.4 / 2 / 2</gadget>
<output>1.6</output>

<gadget id="calculator">100 / 0.8</gadget>
<output>125</output>

<gadget id="calculator">13 * 1.6 * 125</gadget>
<output>2_600</output>

<result>2_600</result>