Alright, let's work through 20425814 times 69144649 step by step
20425814 × 69144649 = 69144649 × (20425814)
+ 69144649 × 4 giving us 276578596
+ 69144649 × 10 that equals 691446490
+ 69144649 × 800 producing 55315719200
+ 69144649 × 5000 giving us 345723245000
+ 69144649 × 20000 that equals 1382892980000
+ 69144649 × 400000 resulting in 27657859600000
+ 69144649 × 0000000 what gives us 0
+ 69144649 × 20000000 producing 1382892980000000

= 1412335739569286
