No problem, we've got 3930 and 4010 to multiply
3930 × 4010 = 4010 × (3930)
+ 4010 × 0 which equals 0
+ 4010 × 30 what gives us 120300
+ 4010 × 900 resulting in 3609000
+ 4010 × 3000 that results in 12030000

= 15759300
