No problem, we've got 2005 and 6407 to multiply
2005 × 6407 = 6407 × (2005)
+ 6407 × 5 which equals 32035
+ 6407 × 00 that equals 0
+ 6407 × 000 what gives us 0
+ 6407 × 2000 that is equal 12814000

= 12846035
