We're going to solve 1007 multiplied by 3980
1007 × 3980 = 3980 × (1007)
+ 3980 × 7 that equals 27860
+ 3980 × 00 which equals 0
+ 3980 × 000 which equals 0
+ 3980 × 1000 that equals 3980000

= 4007860
