Alright, let's work through 28439724 times 74663605 step by step
28439724 × 74663605 = 74663605 × (28439724)
+ 74663605 × 4 that is equal 298654420
+ 74663605 × 20 resulting in 1493272100
+ 74663605 × 700 that results in 52264523500
+ 74663605 × 9000 producing 671972445000
+ 74663605 × 30000 that is equal 2239908150000
+ 74663605 × 400000 yielding 29865442000000
+ 74663605 × 8000000 that equals 597308840000000
+ 74663605 × 20000000 that equals 1493272100000000

= 2123412319045020
