No problem, we've got 5891 and 1158 to multiply
5891 × 1158 = 1158 × (5891)
+ 1158 × 1 what gives us 1158
+ 1158 × 90 that results in 104220
+ 1158 × 800 yielding 926400
+ 1158 × 5000 what gives us 5790000

= 6821778
