No problem, we've got 6246 and 6408 to multiply
6246 × 6408 = 6408 × (6246)
+ 6408 × 6 which equals 38448
+ 6408 × 40 that is equal 256320
+ 6408 × 200 what gives us 1281600
+ 6408 × 6000 giving us 38448000

= 40024368
