No problem, we've got 3108 and 6306 to multiply
3108 × 6306 = 6306 × (3108)
+ 6306 × 8 that results in 50448
+ 6306 × 00 what gives us 0
+ 6306 × 100 which equals 630600
+ 6306 × 3000 that equals 18918000

= 19599048
