Alright, let's work through 7800 times 8798 step by step
7800 × 8798 = 8798 × (7800)
+ 8798 × 0 that equals 0
+ 8798 × 00 yielding 0
+ 8798 × 800 that results in 7038400
+ 8798 × 7000 giving us 61586000

= 68624400
