Alright, let's work through 68984945 times 72503855 step by step
68984945 × 72503855 = 72503855 × (68984945)
+ 72503855 × 5 what gives us 362519275
+ 72503855 × 40 giving us 2900154200
+ 72503855 × 900 giving us 65253469500
+ 72503855 × 4000 yielding 290015420000
+ 72503855 × 80000 producing 5800308400000
+ 72503855 × 900000 yielding 65253469500000
+ 72503855 × 8000000 producing 580030840000000
+ 72503855 × 60000000 resulting in 4350231300000000

= 5001674449462975
