\begin{array}{r||c|c|c|c}
&\times&=&\bullet&\circ\\\hline\hline
0&\frac 1 7&\frac 2 7&\frac 4 7&0\\\hline
1&\frac 2{21}&\frac 5{21}&\frac{11}{21}&\frac 1 7\\\hline
2&\frac 1{12}&\frac{25}{126}&\frac{29}{63}&\frac{65}{252}\\\hline
3&\frac 1{14}&\frac{43}{252}&\frac{101}{252}&\frac 5{14}\\\hline
4&\frac{187}{3024}&\frac{223}{1512}&\frac{263}{756}&\frac{1339}{3024}\\\hline
5&\frac 3{56}&\frac{1159}{9072}&\frac{391}{1296}&\frac{335}{648}\\\hline
6&\frac {1685}{36288}&\frac{287}{2592}&\frac{113}{432}&\frac{7031}{12096}\\\hline
7&\frac{313}{7776}&\frac{43}{448}&\frac{2743}{12096}&\frac{34673}{54432}\end{array}