A trapezoidal paddy field has an upper base of 25 meters, a lower base of 35 meters, and a height of 20 meters. If rice seedlings are transplanted according to an average of 30 square decimeters per hole, how much can be planted in this field?
一块梯形水稻田上底25米，下底35米，高20米．如果按照平均每穴30平方分米插秧，这块地大约能插多少？
<gadget id="calculator">25 + 35</gadget>
<output>60</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">100 / 30</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">60 * 10 * (10/3)</gadget>
<output>2_000</output>

<result>2_000</result>