No problem, we've got 1304 and 6447 to multiply
1304 × 6447 = 6447 × (1304)
+ 6447 × 4 what gives us 25788
+ 6447 × 00 which equals 0
+ 6447 × 300 giving us 1934100
+ 6447 × 1000 producing 6447000

= 8406888
