Let's calculate 9987 x 4220
9987 × 4220 = 4220 × (9987)
+ 4220 × 7 what gives us 29540
+ 4220 × 80 that is equal 337600
+ 4220 × 900 which equals 3798000
+ 4220 × 9000 that is equal 37980000

= 42145140
