No problem, we've got 2638 and 3995 to multiply
2638 × 3995 = 3995 × (2638)
+ 3995 × 8 what gives us 31960
+ 3995 × 30 producing 119850
+ 3995 × 600 that equals 2397000
+ 3995 × 2000 that equals 7990000

= 10538810
