No problem, we've got 3864 and 6445 to multiply
3864 × 6445 = 6445 × (3864)
+ 6445 × 4 resulting in 25780
+ 6445 × 60 that is equal 386700
+ 6445 × 800 yielding 5156000
+ 6445 × 3000 what gives us 19335000

= 24903480
