In a trapezoidal field, the upper base is 50 meters, and the lower base and height are 1.6 times the upper base. A total of 1,300 trees are planted. How many square meters does each tree occupy on average?
一块梯形的田地，上底是50米，下底和高都是上底的1.6倍，一共种树1300棵，平均每棵树占地是多少平方米？
<gadget id="calculator">50 * 1.6</gadget>
<output>80</output>

<gadget id="calculator">50 + 80</gadget>
<output>130</output>

<gadget id="calculator">80 / 2 / 1_300</gadget>
<output>2/65 = around 0.030769</output>

<gadget id="calculator">130 * (2/65)</gadget>
<output>4</output>

<result>4</result>