Assuming that the phalanx faces east, four people fly to the east and three people fly to the west, then this column has 4+ 1+3=8 people, 2 people in the south and 5 people in the north, the column with flying is 2+ 1+5=8, and the number of phalanxes is 8×8.

(4+ 1+3)x(2+ 1+5)

=8x8

=64 (person)