Alright, let's work through 8430 times 5390 step by step
8430 × 5390 = 5390 × (8430)
+ 5390 × 0 that equals 0
+ 5390 × 30 that equals 161700
+ 5390 × 400 giving us 2156000
+ 5390 × 8000 yielding 43120000

= 45437700
