No problem, we've got 3871 and 4470 to multiply
3871 × 4470 = 4470 × (3871)
+ 4470 × 1 which equals 4470
+ 4470 × 70 that is equal 312900
+ 4470 × 800 resulting in 3576000
+ 4470 × 3000 what gives us 13410000

= 17303370
