The three sides of a triangular fish pond are 40 meters, 60 meters, and 70 meters long respectively. If a tree is planted every 10 meters, how many trees are planted in total?
三角形鱼塘的三条边分别长40米、60米、70米，如果每隔10米栽一棵树，共栽树多少棵．
<gadget id="calculator">40 + 60 + 70</gadget>
<output>170</output>

<gadget id="calculator">170 / 10</gadget>
<output>17</output>

<result>17</result>