Alright, let's work through 1791 times 2191 step by step
1791 × 2191 = 2191 × (1791)
+ 2191 × 1 which equals 2191
+ 2191 × 90 that results in 197190
+ 2191 × 700 giving us 1533700
+ 2191 × 1000 producing 2191000

= 3924081
