Alright, let's work through 3680 times 4729 step by step
3680 × 4729 = 4729 × (3680)
+ 4729 × 0 what gives us 0
+ 4729 × 80 which equals 378320
+ 4729 × 600 resulting in 2837400
+ 4729 × 3000 which equals 14187000

= 17402720
