Alright, let's work through 7780 times 3944 step by step
7780 × 3944 = 3944 × (7780)
+ 3944 × 0 that results in 0
+ 3944 × 80 that is equal 315520
+ 3944 × 700 that equals 2760800
+ 3944 × 7000 that results in 27608000

= 30684320
