Alright, let's work through 2172 times 2615 step by step
2172 × 2615 = 2615 × (2172)
+ 2615 × 2 that equals 5230
+ 2615 × 70 resulting in 183050
+ 2615 × 100 that results in 261500
+ 2615 × 2000 producing 5230000

= 5679780
