No problem, we've got 1869 and 4100 to multiply
1869 × 4100 = 4100 × (1869)
+ 4100 × 9 resulting in 36900
+ 4100 × 60 which equals 246000
+ 4100 × 800 yielding 3280000
+ 4100 × 1000 that is equal 4100000

= 7662900
