Alright, let's work through 3607 times 3691 step by step
3607 × 3691 = 3691 × (3607)
+ 3691 × 7 what gives us 25837
+ 3691 × 00 producing 0
+ 3691 × 600 that equals 2214600
+ 3691 × 3000 which equals 11073000

= 13313437
