Alright, let's work through 3900 times 4727 step by step
3900 × 4727 = 4727 × (3900)
+ 4727 × 0 producing 0
+ 4727 × 00 that results in 0
+ 4727 × 900 which equals 4254300
+ 4727 × 3000 what gives us 14181000

= 18435300
