No problem, we've got 6338 and 6240 to multiply
6338 × 6240 = 6240 × (6338)
+ 6240 × 8 that is equal 49920
+ 6240 × 30 that is equal 187200
+ 6240 × 300 which equals 1872000
+ 6240 × 6000 which equals 37440000

= 39549120
