Alright, let's work through 21243076 times 30038784 step by step
21243076 × 30038784 = 30038784 × (21243076)
+ 30038784 × 6 that equals 180232704
+ 30038784 × 70 that equals 2102714880
+ 30038784 × 000 giving us 0
+ 30038784 × 3000 that results in 90116352000
+ 30038784 × 40000 what gives us 1201551360000
+ 30038784 × 200000 what gives us 6007756800000
+ 30038784 × 1000000 yielding 30038784000000
+ 30038784 × 20000000 that results in 600775680000000

= 638116171459584
