Build a circular scenic spot with a width of 10 meters along a circular lawn with a diameter of 50 meters to plant landscape trees. It is known that 3 trees are planted per square meter, and each tree costs 200 yuan. How much does the tree cost?
沿着一个直径为50米的圆形草地外修一条宽10米的环形的风景区用来种植风景树，已知每平方米种3棵树，每棵树需要200元，这片风景区种树共需要多少元钱？
<gadget id="calculator">50 / 2</gadget>
<output>25</output>

<gadget id="calculator">25 + 10</gadget>
<output>35</output>

<gadget id="calculator">35 ** 2</gadget>
<output>1_225</output>

<gadget id="calculator">25 ** 2</gadget>
<output>625</output>

<gadget id="calculator">1_225 - 625</gadget>
<output>600</output>

<gadget id="calculator">3.14 * 600</gadget>
<output>1_884</output>

<gadget id="calculator">1_884 * 3</gadget>
<output>5_652</output>

<gadget id="calculator">5_652 * 200</gadget>
<output>1_130_400</output>

<result>1_130_400</result>