Alright, let's work through 8152 times 2578 step by step
8152 × 2578 = 2578 × (8152)
+ 2578 × 2 what gives us 5156
+ 2578 × 50 what gives us 128900
+ 2578 × 100 that results in 257800
+ 2578 × 8000 producing 20624000

= 21015856
