Alright, let's work through 65139780 times 63379405 step by step
65139780 × 63379405 = 63379405 × (65139780)
+ 63379405 × 0 which equals 0
+ 63379405 × 80 that is equal 5070352400
+ 63379405 × 700 which equals 44365583500
+ 63379405 × 9000 resulting in 570414645000
+ 63379405 × 30000 which equals 1901382150000
+ 63379405 × 100000 yielding 6337940500000
+ 63379405 × 5000000 yielding 316897025000000
+ 63379405 × 60000000 resulting in 3802764300000000

= 4128520498230900
