Alright, let's work through 3663 times 2003 step by step
3663 × 2003 = 2003 × (3663)
+ 2003 × 3 what gives us 6009
+ 2003 × 60 producing 120180
+ 2003 × 600 that is equal 1201800
+ 2003 × 3000 producing 6009000

= 7336989
