Alright, let's work through 21630326 times 66497548 step by step
21630326 × 66497548 = 66497548 × (21630326)
+ 66497548 × 6 which equals 398985288
+ 66497548 × 20 what gives us 1329950960
+ 66497548 × 300 yielding 19949264400
+ 66497548 × 0000 that is equal 0
+ 66497548 × 30000 that results in 1994926440000
+ 66497548 × 600000 yielding 39898528800000
+ 66497548 × 1000000 which equals 66497548000000
+ 66497548 × 20000000 which equals 1329950960000000

= 1438363641440648
