Alright, let's work through 21605308 times 61073344 step by step
21605308 × 61073344 = 61073344 × (21605308)
+ 61073344 × 8 resulting in 488586752
+ 61073344 × 00 resulting in 0
+ 61073344 × 300 giving us 18322003200
+ 61073344 × 5000 producing 305366720000
+ 61073344 × 00000 resulting in 0
+ 61073344 × 600000 that is equal 36644006400000
+ 61073344 × 1000000 that equals 61073344000000
+ 61073344 × 20000000 giving us 1221466880000000

= 1319508407709952
