No problem, we've got 3855 and 1798 to multiply
3855 × 1798 = 1798 × (3855)
+ 1798 × 5 giving us 8990
+ 1798 × 50 that is equal 89900
+ 1798 × 800 that is equal 1438400
+ 1798 × 3000 yielding 5394000

= 6931290
