Alright, let's work through 8877 times 7890 step by step
8877 × 7890 = 7890 × (8877)
+ 7890 × 7 yielding 55230
+ 7890 × 70 resulting in 552300
+ 7890 × 800 giving us 6312000
+ 7890 × 8000 yielding 63120000

= 70039530
