Alright, let's work through 8670 times 1766 step by step
8670 × 1766 = 1766 × (8670)
+ 1766 × 0 what gives us 0
+ 1766 × 70 what gives us 123620
+ 1766 × 600 which equals 1059600
+ 1766 × 8000 producing 14128000

= 15311220
