Alright, let's work through 21582005 times 51814965 step by step
21582005 × 51814965 = 51814965 × (21582005)
+ 51814965 × 5 resulting in 259074825
+ 51814965 × 00 that is equal 0
+ 51814965 × 000 that equals 0
+ 51814965 × 2000 giving us 103629930000
+ 51814965 × 80000 that results in 4145197200000
+ 51814965 × 500000 that is equal 25907482500000
+ 51814965 × 1000000 which equals 51814965000000
+ 51814965 × 20000000 which equals 1036299300000000

= 1118270833704825
