We're going to solve 1663 multiplied by 1312
1663 × 1312 = 1312 × (1663)
+ 1312 × 3 producing 3936
+ 1312 × 60 what gives us 78720
+ 1312 × 600 which equals 787200
+ 1312 × 1000 yielding 1312000

= 2181856
