Alright, let's work through 3980 times 4887 step by step
3980 × 4887 = 4887 × (3980)
+ 4887 × 0 giving us 0
+ 4887 × 80 which equals 390960
+ 4887 × 900 which equals 4398300
+ 4887 × 3000 what gives us 14661000

= 19450260
