v=
        1         3         5 
v+v=
        2         6        10 
v-v=
        0         0         0 
v*2=
        2         6        10 
v=
      0.5       1.5       2.5 
u=
      666       1.5       2.5 
v=
      0.5       1.5       2.5 
w=
      999       1.5       2.5 
v=
      999       1.5       2.5 
u+v+w=
     2664       4.5       7.5 
A=
        1         2         3 
        2         3         4 
A^T
        1         2 
        2         3 
        3         4 
B=
        1         2         3 
        2         3         4 
B after B00=9
        9         2         3 
        2         3         4 
A after B00=9
        1         2         3 
        2         3         4 
A*2=
        2         4         6 
        4         6         8 
A/2=
      0.5         1       1.5 
        1       1.5         2 
A+B+C=
       12         8        12 
        8        12        16