Alright, let's work through 78899081 times 67299986 step by step
78899081 × 67299986 = 67299986 × (78899081)
+ 67299986 × 1 that is equal 67299986
+ 67299986 × 80 what gives us 5383998880
+ 67299986 × 000 what gives us 0
+ 67299986 × 9000 that equals 605699874000
+ 67299986 × 90000 that is equal 6056998740000
+ 67299986 × 800000 what gives us 53839988800000
+ 67299986 × 8000000 resulting in 538399888000000
+ 67299986 × 70000000 that equals 4710999020000000

= 5309907046712866
