Alright, let's work through 5145 times 8780 step by step
5145 × 8780 = 8780 × (5145)
+ 8780 × 5 producing 43900
+ 8780 × 40 that equals 351200
+ 8780 × 100 which equals 878000
+ 8780 × 5000 resulting in 43900000

= 45173100
