No problem, we've got 2142 and 8407 to multiply
2142 × 8407 = 8407 × (2142)
+ 8407 × 2 yielding 16814
+ 8407 × 40 what gives us 336280
+ 8407 × 100 that equals 840700
+ 8407 × 2000 that is equal 16814000

= 18007794
