Alright, let's work through 2931 times 1615 step by step
2931 × 1615 = 1615 × (2931)
+ 1615 × 1 that results in 1615
+ 1615 × 30 giving us 48450
+ 1615 × 900 resulting in 1453500
+ 1615 × 2000 yielding 3230000

= 4733565
