Alright, let's work through 64146993 times 79086207 step by step
64146993 × 79086207 = 79086207 × (64146993)
+ 79086207 × 3 resulting in 237258621
+ 79086207 × 90 that results in 7117758630
+ 79086207 × 900 giving us 71177586300
+ 79086207 × 6000 resulting in 474517242000
+ 79086207 × 40000 resulting in 3163448280000
+ 79086207 × 100000 that is equal 7908620700000
+ 79086207 × 4000000 that equals 316344828000000
+ 79086207 × 60000000 producing 4745172420000000

= 5073142366825551
