Alright, let's work through 5205 times 3520 step by step
5205 × 3520 = 3520 × (5205)
+ 3520 × 5 giving us 17600
+ 3520 × 00 what gives us 0
+ 3520 × 200 giving us 704000
+ 3520 × 5000 that equals 17600000

= 18321600
