Alright, let's work through 3658 times 5267 step by step
3658 × 5267 = 5267 × (3658)
+ 5267 × 8 which equals 42136
+ 5267 × 50 that is equal 263350
+ 5267 × 600 that results in 3160200
+ 5267 × 3000 resulting in 15801000

= 19266686
