Alright, let's work through 1815 times 1723 step by step
1815 × 1723 = 1723 × (1815)
+ 1723 × 5 giving us 8615
+ 1723 × 10 what gives us 17230
+ 1723 × 800 that results in 1378400
+ 1723 × 1000 that results in 1723000

= 3127245
