No problem, we've got 3902 and 4098 to multiply
3902 × 4098 = 4098 × (3902)
+ 4098 × 2 which equals 8196
+ 4098 × 00 what gives us 0
+ 4098 × 900 giving us 3688200
+ 4098 × 3000 what gives us 12294000

= 15990396
