Alright, let's work through 8090 times 8458 step by step
8090 × 8458 = 8458 × (8090)
+ 8458 × 0 that is equal 0
+ 8458 × 90 yielding 761220
+ 8458 × 000 which equals 0
+ 8458 × 8000 that is equal 67664000

= 68425220
