Alright, let's work through 5130 times 7778 step by step
5130 × 7778 = 7778 × (5130)
+ 7778 × 0 resulting in 0
+ 7778 × 30 producing 233340
+ 7778 × 100 giving us 777800
+ 7778 × 5000 that is equal 38890000

= 39901140
