There is 1 red dot and 49 blue dots on a circle. What is the difference between the number of convex polygons whose vertices are blue dots and the number of convex polygons whose vertices are red dots.
在一圆周上有1个红点和49个蓝点．所有顶点都是蓝点的凸多边形的个数，与有一个顶点是红点的凸多边形的个数，相差多少．
<gadget id="calculator">48 / 2</gadget>
<output>24</output>

<gadget id="calculator">49 * 24</gadget>
<output>1_176</output>

<result>1_176</result>