Alright, let's work through 8458 times 2220 step by step
8458 × 2220 = 2220 × (8458)
+ 2220 × 8 which equals 17760
+ 2220 × 50 what gives us 111000
+ 2220 × 400 yielding 888000
+ 2220 × 8000 that results in 17760000

= 18776760
