No problem, we've got 4855 and 4292 to multiply
4855 × 4292 = 4292 × (4855)
+ 4292 × 5 what gives us 21460
+ 4292 × 50 which equals 214600
+ 4292 × 800 yielding 3433600
+ 4292 × 4000 that results in 17168000

= 20837660
