come si fa 35667 x 9999 ?

7 6 6 5 3 9 9 9 9 x = 3 6 0 6 0 6 1 5 2 3 3 6 0 6 0 6 1 5 2 3 3 6 0 6 0 6 1 5 2 3 3 6 0 6 0 6 1 5 2 3 3 3 3 4 3 6 6 5 3
x