Alright, let's work through 7858 times 9066 step by step
7858 × 9066 = 9066 × (7858)
+ 9066 × 8 resulting in 72528
+ 9066 × 50 yielding 453300
+ 9066 × 800 yielding 7252800
+ 9066 × 7000 giving us 63462000

= 71240628
