Alright, let's work through 64244305 times 20963809 step by step
64244305 × 20963809 = 20963809 × (64244305)
+ 20963809 × 5 which equals 104819045
+ 20963809 × 00 that equals 0
+ 20963809 × 300 yielding 6289142700
+ 20963809 × 4000 that results in 83855236000
+ 20963809 × 40000 that equals 838552360000
+ 20963809 × 200000 that equals 4192761800000
+ 20963809 × 4000000 resulting in 83855236000000
+ 20963809 × 60000000 that results in 1257828540000000

= 1346805339357745
