Alright, let's work through 78043986 times 47266820 step by step
78043986 × 47266820 = 47266820 × (78043986)
+ 47266820 × 6 which equals 283600920
+ 47266820 × 80 that is equal 3781345600
+ 47266820 × 900 that equals 42540138000
+ 47266820 × 3000 that results in 141800460000
+ 47266820 × 40000 which equals 1890672800000
+ 47266820 × 000000 resulting in 0
+ 47266820 × 8000000 yielding 378134560000000
+ 47266820 × 70000000 that results in 3308677400000000

= 3688891038344520
