Alright, let's work through 1623 times 6612 step by step
1623 × 6612 = 6612 × (1623)
+ 6612 × 3 giving us 19836
+ 6612 × 20 producing 132240
+ 6612 × 600 resulting in 3967200
+ 6612 × 1000 yielding 6612000

= 10731276
