No problem, we've got 1280 and 6397 to multiply
1280 × 6397 = 6397 × (1280)
+ 6397 × 0 that is equal 0
+ 6397 × 80 that equals 511760
+ 6397 × 200 that results in 1279400
+ 6397 × 1000 that equals 6397000

= 8188160
