No problem, we've got 6166 and 3500 to multiply
6166 × 3500 = 3500 × (6166)
+ 3500 × 6 what gives us 21000
+ 3500 × 60 that results in 210000
+ 3500 × 100 that results in 350000
+ 3500 × 6000 that results in 21000000

= 21581000
