Alright, let's work through 5260 times 8203 step by step
5260 × 8203 = 8203 × (5260)
+ 8203 × 0 that results in 0
+ 8203 × 60 yielding 492180
+ 8203 × 200 that is equal 1640600
+ 8203 × 5000 yielding 41015000

= 43147780
