Alright, let's work through 3492 times 6643 step by step
3492 × 6643 = 6643 × (3492)
+ 6643 × 2 that is equal 13286
+ 6643 × 90 which equals 597870
+ 6643 × 400 that equals 2657200
+ 6643 × 3000 that equals 19929000

= 23197356
