Alright, let's work through 6628 times 7421 step by step
6628 × 7421 = 7421 × (6628)
+ 7421 × 8 giving us 59368
+ 7421 × 20 that is equal 148420
+ 7421 × 600 that equals 4452600
+ 7421 × 6000 yielding 44526000

= 49186388
