Alright, let's work through 5379 times 5155 step by step
5379 × 5155 = 5155 × (5379)
+ 5155 × 9 that equals 46395
+ 5155 × 70 yielding 360850
+ 5155 × 300 that is equal 1546500
+ 5155 × 5000 that results in 25775000

= 27728745
