No problem, we've got 1859 and 3878 to multiply
1859 × 3878 = 3878 × (1859)
+ 3878 × 9 yielding 34902
+ 3878 × 50 giving us 193900
+ 3878 × 800 which equals 3102400
+ 3878 × 1000 what gives us 3878000

= 7209202
