Alright, let's work through 64347603 times 76971773 step by step
64347603 × 76971773 = 76971773 × (64347603)
+ 76971773 × 3 which equals 230915319
+ 76971773 × 00 that results in 0
+ 76971773 × 600 producing 46183063800
+ 76971773 × 7000 what gives us 538802411000
+ 76971773 × 40000 that results in 3078870920000
+ 76971773 × 300000 yielding 23091531900000
+ 76971773 × 4000000 that results in 307887092000000
+ 76971773 × 60000000 giving us 4618306380000000

= 4952949091210119
