Alright, let's work through 84658279 times 7956483 step by step
84658279 × 7956483 = 7956483 × (84658279)
+ 7956483 × 9 that results in 71608347
+ 7956483 × 70 what gives us 556953810
+ 7956483 × 200 which equals 1591296600
+ 7956483 × 8000 yielding 63651864000
+ 7956483 × 50000 producing 397824150000
+ 7956483 × 600000 that is equal 4773889800000
+ 7956483 × 4000000 which equals 31825932000000
+ 7956483 × 80000000 producing 636518640000000

= 673582157672757
