In a trapezoidal forest, the upper base is 80 meters long, the lower base is 95 meters long, and the height is 50 m. If each tree occupies an average area of 2.5 square meters, how many trees can be planted in this land?
一块梯形树林，上底长80米，下底长95米，高50m，如果平均每棵树占地2.5平方米，这块地可以种树多少棵？
<gadget id="calculator">80 + 95</gadget>
<output>175</output>

<gadget id="calculator">50 / 2 / 2.5</gadget>
<output>10</output>

<gadget id="calculator">175 * 10</gadget>
<output>1_750</output>

<result>1_750</result>