come si fa 10000 x 23450 ?

0 0 0 0 1 0 5 4 3 2 x = 0 0 0 0 0 0 0 0 0 5 0 0 0 0 4 0 0 0 0 3 0 0 0 0 2 0 0 0 0 0 5 4 3 2
x