Alright, let's work through 3890 times 3427 step by step
3890 × 3427 = 3427 × (3890)
+ 3427 × 0 what gives us 0
+ 3427 × 90 that equals 308430
+ 3427 × 800 that results in 2741600
+ 3427 × 3000 yielding 10281000

= 13331030
