No problem, we've got 7423 and 3830 to multiply
7423 × 3830 = 3830 × (7423)
+ 3830 × 3 what gives us 11490
+ 3830 × 20 which equals 76600
+ 3830 × 400 that is equal 1532000
+ 3830 × 7000 yielding 26810000

= 28430090
