Alright, let's work through 78348285 times 86034406 step by step
78348285 × 86034406 = 86034406 × (78348285)
+ 86034406 × 5 yielding 430172030
+ 86034406 × 80 that equals 6882752480
+ 86034406 × 200 yielding 17206881200
+ 86034406 × 8000 resulting in 688275248000
+ 86034406 × 40000 that results in 3441376240000
+ 86034406 × 300000 yielding 25810321800000
+ 86034406 × 8000000 that results in 688275248000000
+ 86034406 × 70000000 yielding 6022408420000000

= 6740648161093710
