Alright, let's work through 5448 times 621 step by step
5448 × 621 = 621 × (5448)
+ 621 × 8 what gives us 4968
+ 621 × 40 giving us 24840
+ 621 × 400 that equals 248400
+ 621 × 5000 yielding 3105000

= 3383208
