The answer is 915.39.217.760 J% E7 S# c1 X7 j* L
1 row 3x4+1x3=15
- _, K0 g% O! J. C$ `" J8 J2 row 4x5+2x4=28
9 p$ [ X% n% K. Y- E* |3 V/ a5.39.217.763 row 5x6+3x5=455.39.217.76/ e* P: p, u5 n q
4 row 6x7+4x6=66
) t# m; U- L2 h; r: }8 y; N8 G' Ztvb now,tvbnow,bttvb5 row 7x8+5x7=91  |