Alright, let's work through 63487008 times 78508955 step by step
63487008 × 78508955 = 78508955 × (63487008)
+ 78508955 × 8 that equals 628071640
+ 78508955 × 00 resulting in 0
+ 78508955 × 000 which equals 0
+ 78508955 × 7000 that equals 549562685000
+ 78508955 × 80000 that equals 6280716400000
+ 78508955 × 400000 that is equal 31403582000000
+ 78508955 × 3000000 yielding 235526865000000
+ 78508955 × 60000000 which equals 4710537300000000

= 4984298654156640
