Alright, let's work through 6400 times 1724 step by step
6400 × 1724 = 1724 × (6400)
+ 1724 × 0 what gives us 0
+ 1724 × 00 that is equal 0
+ 1724 × 400 which equals 689600
+ 1724 × 6000 yielding 10344000

= 11033600
