Alright, let's work through 6635 times 3297 step by step
6635 × 3297 = 3297 × (6635)
+ 3297 × 5 which equals 16485
+ 3297 × 30 which equals 98910
+ 3297 × 600 that equals 1978200
+ 3297 × 6000 producing 19782000

= 21875595
