Alright, let's work through 6259 times 121 step by step
6259 × 121 = 121 × (6259)
+ 121 × 9 that results in 1089
+ 121 × 50 what gives us 6050
+ 121 × 200 that results in 24200
+ 121 × 6000 yielding 726000

= 757339
