No problem, we've got 9902 and 7839 to multiply
9902 × 7839 = 7839 × (9902)
+ 7839 × 2 that results in 15678
+ 7839 × 00 which equals 0
+ 7839 × 900 producing 7055100
+ 7839 × 9000 resulting in 70551000

= 77621778
