sc7086

The answer is 91
  W) I/ j! i$ q& ?9 S& J! v+ N5.39.217.77:88981 row 3x4+1x3=15% |/ S6 d* S. t- W
2 row 4x5+2x4=28+ w$ S# z( H1 T) |5 F5 Q
3 row 5x6+3x5=45
# F4 O1 h/ H+ Z, s( Utvb now,tvbnow,bttvb4 row 6x7+4x6=66
6 b& L+ N" H! C6 l4 k" b& U公仔箱論壇5 row 7x8+5x7=91