Alright, let's work through 1779 times 400 step by step
1779 × 400 = 400 × (1779)
+ 400 × 9 yielding 3600
+ 400 × 70 resulting in 28000
+ 400 × 700 which equals 280000
+ 400 × 1000 giving us 400000

= 711600
