Alright, let's work through 78496189 times 56900807 step by step
78496189 × 56900807 = 56900807 × (78496189)
+ 56900807 × 9 resulting in 512107263
+ 56900807 × 80 giving us 4552064560
+ 56900807 × 100 producing 5690080700
+ 56900807 × 6000 yielding 341404842000
+ 56900807 × 90000 producing 5121072630000
+ 56900807 × 400000 that equals 22760322800000
+ 56900807 × 8000000 yielding 455206456000000
+ 56900807 × 70000000 producing 3983056490000000

= 4466496500524523
