No problem, we've got 6990 and 3999 to multiply
6990 × 3999 = 3999 × (6990)
+ 3999 × 0 that is equal 0
+ 3999 × 90 that equals 359910
+ 3999 × 900 that equals 3599100
+ 3999 × 6000 giving us 23994000

= 27953010
