Let's calculate 4977 x 3991
4977 × 3991 = 3991 × (4977)
+ 3991 × 7 that is equal 27937
+ 3991 × 70 that results in 279370
+ 3991 × 900 giving us 3591900
+ 3991 × 4000 that equals 15964000

= 19863207
