No problem, we've got 6420 and 2799 to multiply
6420 × 2799 = 2799 × (6420)
+ 2799 × 0 that results in 0
+ 2799 × 20 that equals 55980
+ 2799 × 400 what gives us 1119600
+ 2799 × 6000 giving us 16794000

= 17969580
