The shape of a piece of land is trapezoidal, its upper base is 13 meters, its lower base is 23 meters, and its height is 15 meters. If an average cabbage covers an area of 12 square decimeters, how many cabbages are there in this field?
一块地的形状是梯形，它的上底是13米，下底是23米，高是15米．如果平均每棵白菜占地12平方分米，这块地里一共有多少棵白菜？
<gadget id="calculator">13 + 23</gadget>
<output>36</output>

<gadget id="calculator">15 / 2 / 0.12</gadget>
<output>62.5</output>

<gadget id="calculator">36 * 62.5</gadget>
<output>2_250</output>

<result>2_250</result>