Alright, let's work through 3954 times 1280 step by step
3954 × 1280 = 1280 × (3954)
+ 1280 × 4 resulting in 5120
+ 1280 × 50 that equals 64000
+ 1280 × 900 giving us 1152000
+ 1280 × 3000 producing 3840000

= 5061120
