No problem, we've got 4709 and 3878 to multiply
4709 × 3878 = 3878 × (4709)
+ 3878 × 9 giving us 34902
+ 3878 × 00 what gives us 0
+ 3878 × 700 yielding 2714600
+ 3878 × 4000 what gives us 15512000

= 18261502
