No problem, we've got 2339 and 5760 to multiply
2339 × 5760 = 5760 × (2339)
+ 5760 × 9 what gives us 51840
+ 5760 × 30 that equals 172800
+ 5760 × 300 that is equal 1728000
+ 5760 × 2000 that equals 11520000

= 13472640
