Alright, let's work through 61897794 times 64147334 step by step
61897794 × 64147334 = 64147334 × (61897794)
+ 64147334 × 4 what gives us 256589336
+ 64147334 × 90 resulting in 5773260060
+ 64147334 × 700 giving us 44903133800
+ 64147334 × 7000 resulting in 449031338000
+ 64147334 × 90000 which equals 5773260060000
+ 64147334 × 800000 that is equal 51317867200000
+ 64147334 × 1000000 that results in 64147334000000
+ 64147334 × 60000000 producing 3848840040000000

= 3970578465581196
