The answer is 91
& M# a7 G; s! ~1 row 3x4+1x3=15
7 V7 {( ^6 m* ~tvb now,tvbnow,bttvb2 row 4x5+2x4=28
2 z2 v L4 u/ O7 S Ntvb now,tvbnow,bttvb3 row 5x6+3x5=45
c5 q X2 O3 ]7 M- e) L4 row 6x7+4x6=66
7 g2 e0 B3 ^8 W+ G) u n# vwww1.tvboxnow.com5 row 7x8+5x7=91  |