We're going to solve 1827 multiplied by 1638
1827 × 1638 = 1638 × (1827)
+ 1638 × 7 yielding 11466
+ 1638 × 20 that equals 32760
+ 1638 × 800 resulting in 1310400
+ 1638 × 1000 resulting in 1638000

= 2992626
