Alright, let's work through 6443 times 250 step by step
6443 × 250 = 250 × (6443)
+ 250 × 3 what gives us 750
+ 250 × 40 that equals 10000
+ 250 × 400 that is equal 100000
+ 250 × 6000 resulting in 1500000

= 1610750
