No problem, we've got 8394 and 2161 to multiply
8394 × 2161 = 2161 × (8394)
+ 2161 × 4 yielding 8644
+ 2161 × 90 that is equal 194490
+ 2161 × 300 what gives us 648300
+ 2161 × 8000 which equals 17288000

= 18139434
