No problem, we've got 3639 and 825 to multiply
3639 × 825 = 825 × (3639)
+ 825 × 9 what gives us 7425
+ 825 × 30 yielding 24750
+ 825 × 600 resulting in 495000
+ 825 × 3000 yielding 2475000

= 3002175
