No problem, we've got 7858 and 3655 to multiply
7858 × 3655 = 3655 × (7858)
+ 3655 × 8 yielding 29240
+ 3655 × 50 what gives us 182750
+ 3655 × 800 that is equal 2924000
+ 3655 × 7000 giving us 25585000

= 28720990
