No problem, we've got 8156 and 1780 to multiply
8156 × 1780 = 1780 × (8156)
+ 1780 × 6 what gives us 10680
+ 1780 × 50 producing 89000
+ 1780 × 100 giving us 178000
+ 1780 × 8000 yielding 14240000

= 14517680
