Alright, let's work through 47128412 times 8480838 step by step
47128412 × 8480838 = 8480838 × (47128412)
+ 8480838 × 2 giving us 16961676
+ 8480838 × 10 which equals 84808380
+ 8480838 × 400 giving us 3392335200
+ 8480838 × 8000 producing 67846704000
+ 8480838 × 20000 that is equal 169616760000
+ 8480838 × 100000 resulting in 848083800000
+ 8480838 × 7000000 resulting in 59365866000000
+ 8480838 × 40000000 which equals 339233520000000

= 399688427369256
