Alright, let's work through 8180 times 663 step by step
8180 × 663 = 663 × (8180)
+ 663 × 0 that equals 0
+ 663 × 80 that results in 53040
+ 663 × 100 resulting in 66300
+ 663 × 8000 which equals 5304000

= 5423340
