Alright, let's work through 64817410 times 21529718 step by step
64817410 × 21529718 = 21529718 × (64817410)
+ 21529718 × 0 resulting in 0
+ 21529718 × 10 resulting in 215297180
+ 21529718 × 400 that is equal 8611887200
+ 21529718 × 7000 what gives us 150708026000
+ 21529718 × 10000 that results in 215297180000
+ 21529718 × 800000 that equals 17223774400000
+ 21529718 × 4000000 producing 86118872000000
+ 21529718 × 60000000 which equals 1291783080000000

= 1395500558790380
