Alright, let's work through 4355 times 6578 step by step
4355 × 6578 = 6578 × (4355)
+ 6578 × 5 which equals 32890
+ 6578 × 50 resulting in 328900
+ 6578 × 300 resulting in 1973400
+ 6578 × 4000 producing 26312000

= 28647190
