Alright, let's work through 6473 times 3640 step by step
6473 × 3640 = 3640 × (6473)
+ 3640 × 3 which equals 10920
+ 3640 × 70 giving us 254800
+ 3640 × 400 resulting in 1456000
+ 3640 × 6000 that equals 21840000

= 23561720
