No problem, we've got 6167 and 6439 to multiply
6167 × 6439 = 6439 × (6167)
+ 6439 × 7 which equals 45073
+ 6439 × 60 producing 386340
+ 6439 × 100 which equals 643900
+ 6439 × 6000 producing 38634000

= 39709313
