Alright, let's work through 64919021 times 31373215 step by step
64919021 × 31373215 = 31373215 × (64919021)
+ 31373215 × 1 that is equal 31373215
+ 31373215 × 20 that is equal 627464300
+ 31373215 × 000 that equals 0
+ 31373215 × 9000 which equals 282358935000
+ 31373215 × 10000 that is equal 313732150000
+ 31373215 × 900000 resulting in 28235893500000
+ 31373215 × 4000000 that equals 125492860000000
+ 31373215 × 60000000 which equals 1882392900000000

= 2036718403422515
