Alright, let's work through 76789340 times 67675615 step by step
76789340 × 67675615 = 67675615 × (76789340)
+ 67675615 × 0 that results in 0
+ 67675615 × 40 that equals 2707024600
+ 67675615 × 300 resulting in 20302684500
+ 67675615 × 9000 which equals 609080535000
+ 67675615 × 80000 yielding 5414049200000
+ 67675615 × 700000 giving us 47372930500000
+ 67675615 × 6000000 resulting in 406053690000000
+ 67675615 × 70000000 producing 4737293050000000

= 5196765809944100
