No problem, we've got 6990 and 2540 to multiply
6990 × 2540 = 2540 × (6990)
+ 2540 × 0 producing 0
+ 2540 × 90 what gives us 228600
+ 2540 × 900 producing 2286000
+ 2540 × 6000 yielding 15240000

= 17754600
