No problem, we've got 2691 and 6820 to multiply
2691 × 6820 = 6820 × (2691)
+ 6820 × 1 what gives us 6820
+ 6820 × 90 resulting in 613800
+ 6820 × 600 what gives us 4092000
+ 6820 × 2000 what gives us 13640000

= 18352620
