Alright, let's work through 21456534 times 13888932 step by step
21456534 × 13888932 = 13888932 × (21456534)
+ 13888932 × 4 that equals 55555728
+ 13888932 × 30 that equals 416667960
+ 13888932 × 500 that equals 6944466000
+ 13888932 × 6000 that equals 83333592000
+ 13888932 × 50000 that results in 694446600000
+ 13888932 × 400000 giving us 5555572800000
+ 13888932 × 1000000 resulting in 13888932000000
+ 13888932 × 20000000 producing 277778640000000

= 298008341681688
