No problem, we've got 84873629 and 84344780 to multiply
84873629 × 84344780 = 84344780 × (84873629)
+ 84344780 × 9 that results in 759103020
+ 84344780 × 20 that results in 1686895600
+ 84344780 × 600 giving us 50606868000
+ 84344780 × 3000 giving us 253034340000
+ 84344780 × 70000 resulting in 5904134600000
+ 84344780 × 800000 resulting in 67475824000000
+ 84344780 × 4000000 which equals 337379120000000
+ 84344780 × 80000000 that results in 6747582400000000

= 7158647565806620
