No problem, we've got 4103 and 7780 to multiply
4103 × 7780 = 7780 × (4103)
+ 7780 × 3 that is equal 23340
+ 7780 × 00 resulting in 0
+ 7780 × 100 that results in 778000
+ 7780 × 4000 that is equal 31120000

= 31921340
