No problem, we've got 1844 and 6397 to multiply
1844 × 6397 = 6397 × (1844)
+ 6397 × 4 what gives us 25588
+ 6397 × 40 what gives us 255880
+ 6397 × 800 what gives us 5117600
+ 6397 × 1000 which equals 6397000

= 11796068
