No problem, we've got 3815 and 7942 to multiply
3815 × 7942 = 7942 × (3815)
+ 7942 × 5 what gives us 39710
+ 7942 × 10 what gives us 79420
+ 7942 × 800 yielding 6353600
+ 7942 × 3000 that results in 23826000

= 30298730
