Alright, let's work through 7780 times 8109 step by step
7780 × 8109 = 8109 × (7780)
+ 8109 × 0 producing 0
+ 8109 × 80 resulting in 648720
+ 8109 × 700 which equals 5676300
+ 8109 × 7000 producing 56763000

= 63088020
