Alright, let's work through 6490 times 6506 step by step
6490 × 6506 = 6506 × (6490)
+ 6506 × 0 giving us 0
+ 6506 × 90 producing 585540
+ 6506 × 400 that equals 2602400
+ 6506 × 6000 which equals 39036000

= 42223940
