Alright, let's work through 5646 times 755 step by step
5646 × 755 = 755 × (5646)
+ 755 × 6 giving us 4530
+ 755 × 40 that results in 30200
+ 755 × 600 resulting in 453000
+ 755 × 5000 producing 3775000

= 4262730
