In a trapezoidal paddy field, the upper base is 25 meters long, the lower base is 35 meters long, and the height is 20 meters. If the seedlings are transplanted at an average of 3 decimeters per hole, how many holes can be inserted in total?
一块梯形水稻田，上底长25米，下底长35米，高20米，如果按平均每穴3平方分米插秧，一共能插多少穴？
<gadget id="calculator">25 + 35</gadget>
<output>60</output>

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

<gadget id="calculator">100 / 3</gadget>
<output>100/3 = around 33.333333</output>

<gadget id="calculator">60 * 10 * (100/3)</gadget>
<output>20_000</output>

<result>20_000</result>