Alright, let's work through 1684 times 2591 step by step
1684 × 2591 = 2591 × (1684)
+ 2591 × 4 that equals 10364
+ 2591 × 80 resulting in 207280
+ 2591 × 600 that equals 1554600
+ 2591 × 1000 giving us 2591000

= 4363244
