Alright, let's work through 8857 times 8820 step by step
8857 × 8820 = 8820 × (8857)
+ 8820 × 7 that equals 61740
+ 8820 × 50 yielding 441000
+ 8820 × 800 that is equal 7056000
+ 8820 × 8000 yielding 70560000

= 78118740
