Let's calculate 6437 x 3625
6437 × 3625 = 3625 × (6437)
+ 3625 × 7 that equals 25375
+ 3625 × 30 what gives us 108750
+ 3625 × 400 that is equal 1450000
+ 3625 × 6000 resulting in 21750000

= 23334125
