come si fa 860 x 12345 ?

0 6 8 5 4 3 2 1 x = 0 0 3 3 4 0 4 2 4 3 0 8 1 5 2 0 2 1 7 1 0 6 8 1 1 1 0 0 7 6 1 6 0 1
x