come si fa 567768 x 454 ?

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