come si fa 1002 x 82736 ?

2 0 0 1 6 3 7 2 8 x = 2 1 1 0 6 6 0 0 3 4 1 1 0 7 4 0 0 2 6 1 1 0 8 1 2 7 4 1 0 9 2 8
x