Alright, let's work through 6257 times 6260 step by step
6257 × 6260 = 6260 × (6257)
+ 6260 × 7 what gives us 43820
+ 6260 × 50 yielding 313000
+ 6260 × 200 which equals 1252000
+ 6260 × 6000 resulting in 37560000

= 39168820
