Alright, let's work through 6245 times 8723 step by step
6245 × 8723 = 8723 × (6245)
+ 8723 × 5 giving us 43615
+ 8723 × 40 giving us 348920
+ 8723 × 200 what gives us 1744600
+ 8723 × 6000 giving us 52338000

= 54475135
