Alright, let's work through 6460 times 661 step by step
6460 × 661 = 661 × (6460)
+ 661 × 0 yielding 0
+ 661 × 60 yielding 39660
+ 661 × 400 resulting in 264400
+ 661 × 6000 that equals 3966000

= 4270060
