No problem, we've got 6663 and 1797 to multiply
6663 × 1797 = 1797 × (6663)
+ 1797 × 3 that equals 5391
+ 1797 × 60 what gives us 107820
+ 1797 × 600 giving us 1078200
+ 1797 × 6000 that results in 10782000

= 11973411
