sc7086

The answer is 91
7 ^. }( `) e7 r# K4 M# Ktvb now,tvbnow,bttvb1 row 3x4+1x3=15
; H6 }: K8 n1 T5.39.217.762 row 4x5+2x4=28tvb now,tvbnow,bttvb+ n9 |' D  y- p( {; G9 N
3 row 5x6+3x5=455.39.217.761 m& X* ]0 Z# N9 r% I/ B! k
4 row 6x7+4x6=66
+ ?9 H: |* y5 R& Y! j公仔箱論壇5 row 7x8+5x7=91