Alright, let's work through 6330 times 2649 step by step
6330 × 2649 = 2649 × (6330)
+ 2649 × 0 giving us 0
+ 2649 × 30 resulting in 79470
+ 2649 × 300 that is equal 794700
+ 2649 × 6000 that equals 15894000

= 16768170
