No problem, we've got 7991 and 3810 to multiply
7991 × 3810 = 3810 × (7991)
+ 3810 × 1 what gives us 3810
+ 3810 × 90 that equals 342900
+ 3810 × 900 resulting in 3429000
+ 3810 × 7000 that is equal 26670000

= 30445710
