Alright, let's work through 3889 times 8140 step by step
3889 × 8140 = 8140 × (3889)
+ 8140 × 9 what gives us 73260
+ 8140 × 80 yielding 651200
+ 8140 × 800 that equals 6512000
+ 8140 × 3000 producing 24420000

= 31656460
