Alright, let's work through 9978 times 2870 step by step
9978 × 2870 = 2870 × (9978)
+ 2870 × 8 yielding 22960
+ 2870 × 70 that is equal 200900
+ 2870 × 900 giving us 2583000
+ 2870 × 9000 yielding 25830000

= 28636860
