Alright, let's work through 5758 times 1390 step by step
5758 × 1390 = 1390 × (5758)
+ 1390 × 8 producing 11120
+ 1390 × 50 that is equal 69500
+ 1390 × 700 which equals 973000
+ 1390 × 5000 that results in 6950000

= 8003620
