Alright, let's work through 3699 times 661 step by step
3699 × 661 = 661 × (3699)
+ 661 × 9 which equals 5949
+ 661 × 90 which equals 59490
+ 661 × 600 that is equal 396600
+ 661 × 3000 that is equal 1983000

= 2445039
