Alright, let's work through 4280090 times 67666706 step by step
4280090 × 67666706 = 67666706 × (4280090)
+ 67666706 × 0 resulting in 0
+ 67666706 × 90 which equals 6090003540
+ 67666706 × 000 which equals 0
+ 67666706 × 0000 that results in 0
+ 67666706 × 80000 that results in 5413336480000
+ 67666706 × 200000 resulting in 13533341200000
+ 67666706 × 4000000 giving us 270666824000000

= 289619591683540
