No problem, we've got 1539 and 6555 to multiply
1539 × 6555 = 6555 × (1539)
+ 6555 × 9 what gives us 58995
+ 6555 × 30 giving us 196650
+ 6555 × 500 yielding 3277500
+ 6555 × 1000 yielding 6555000

= 10088145
