Alright, let's work through 64960341 times 65542271 step by step
64960341 × 65542271 = 65542271 × (64960341)
+ 65542271 × 1 that is equal 65542271
+ 65542271 × 40 what gives us 2621690840
+ 65542271 × 300 producing 19662681300
+ 65542271 × 0000 giving us 0
+ 65542271 × 60000 that equals 3932536260000
+ 65542271 × 900000 resulting in 58988043900000
+ 65542271 × 4000000 that equals 262169084000000
+ 65542271 × 60000000 that results in 3932536260000000

= 4257648274074411
