Alright, let's work through 21340215 times 27198964 step by step
21340215 × 27198964 = 27198964 × (21340215)
+ 27198964 × 5 producing 135994820
+ 27198964 × 10 that equals 271989640
+ 27198964 × 200 yielding 5439792800
+ 27198964 × 0000 producing 0
+ 27198964 × 40000 producing 1087958560000
+ 27198964 × 300000 that equals 8159689200000
+ 27198964 × 1000000 that equals 27198964000000
+ 27198964 × 20000000 that equals 543979280000000

= 580431739537260
