Alright, let's work through 10304998 times 39639799 step by step
10304998 × 39639799 = 39639799 × (10304998)
+ 39639799 × 8 that equals 317118392
+ 39639799 × 90 that equals 3567581910
+ 39639799 × 900 producing 35675819100
+ 39639799 × 4000 giving us 158559196000
+ 39639799 × 00000 producing 0
+ 39639799 × 300000 producing 11891939700000
+ 39639799 × 0000000 that is equal 0
+ 39639799 × 10000000 which equals 396397990000000

= 408488049415402
