We're going to solve 2173 multiplied by 1986
2173 × 1986 = 1986 × (2173)
+ 1986 × 3 what gives us 5958
+ 1986 × 70 resulting in 139020
+ 1986 × 100 what gives us 198600
+ 1986 × 2000 giving us 3972000

= 4315578
