Alright, let's work through 21189608 times 51252645 step by step
21189608 × 51252645 = 51252645 × (21189608)
+ 51252645 × 8 that equals 410021160
+ 51252645 × 00 giving us 0
+ 51252645 × 600 what gives us 30751587000
+ 51252645 × 9000 what gives us 461273805000
+ 51252645 × 80000 producing 4100211600000
+ 51252645 × 100000 resulting in 5125264500000
+ 51252645 × 1000000 giving us 51252645000000
+ 51252645 × 20000000 yielding 1025052900000000

= 1086023456513160
