Alright, let's work through 1623 times 3057 step by step
1623 × 3057 = 3057 × (1623)
+ 3057 × 3 resulting in 9171
+ 3057 × 20 that equals 61140
+ 3057 × 600 that is equal 1834200
+ 3057 × 1000 resulting in 3057000

= 4961511
