There are 11 points on the same plane. (Every three points are not on the same straight line). How many triangles have these points as vertices?
在同一平面上有11个点．(每三个点不在同一直线)．以这些点为顶点的三角形一共有多少个．
<gadget id="calculator">11 * 10 * 9</gadget>
<output>990</output>

<gadget id="calculator">3 * 2 * 1</gadget>
<output>6</output>

<gadget id="calculator">990 / 6</gadget>
<output>165</output>

<result>165</result>