No problem, we've got 8600 and 7140 to multiply
8600 × 7140 = 7140 × (8600)
+ 7140 × 0 yielding 0
+ 7140 × 00 what gives us 0
+ 7140 × 600 what gives us 4284000
+ 7140 × 8000 giving us 57120000

= 61404000
