There is a piece of land in the shape of an equilateral triangle with a side length of 180 meters. Starting from one of the vertices, plant a tree every 10 meters. How many trees are planted on the three sides?
有一块等边三角形形状的土地，边长是180米．从其中的一个顶点开始，每隔10米种一棵树，三条边上一共种树多少棵？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">160 * (3/10)</gadget>
<output>48</output>

<result>48</result>