No problem, we've got 2391 and 5184 to multiply
2391 × 5184 = 5184 × (2391)
+ 5184 × 1 what gives us 5184
+ 5184 × 90 yielding 466560
+ 5184 × 300 resulting in 1555200
+ 5184 × 2000 which equals 10368000

= 12394944
