Alright, let's work through 7761 times 1780 step by step
7761 × 1780 = 1780 × (7761)
+ 1780 × 1 what gives us 1780
+ 1780 × 60 resulting in 106800
+ 1780 × 700 giving us 1246000
+ 1780 × 7000 resulting in 12460000

= 13814580
