Alright, let's work through 84228479 times 66084198 step by step
84228479 × 66084198 = 66084198 × (84228479)
+ 66084198 × 9 that is equal 594757782
+ 66084198 × 70 that equals 4625893860
+ 66084198 × 400 yielding 26433679200
+ 66084198 × 8000 what gives us 528673584000
+ 66084198 × 20000 what gives us 1321683960000
+ 66084198 × 200000 that results in 13216839600000
+ 66084198 × 4000000 producing 264336792000000
+ 66084198 × 80000000 that results in 5286735840000000

= 5566171483474842
