Alright, let's work through 28289964 times 63881974 step by step
28289964 × 63881974 = 63881974 × (28289964)
+ 63881974 × 4 that results in 255527896
+ 63881974 × 60 that is equal 3832918440
+ 63881974 × 900 which equals 57493776600
+ 63881974 × 9000 that equals 574937766000
+ 63881974 × 80000 yielding 5110557920000
+ 63881974 × 200000 producing 12776394800000
+ 63881974 × 8000000 giving us 511055792000000
+ 63881974 × 20000000 that is equal 1277639480000000

= 1807218744708936
