Alright, let's work through 5090 times 9178 step by step
5090 × 9178 = 9178 × (5090)
+ 9178 × 0 that results in 0
+ 9178 × 90 that equals 826020
+ 9178 × 000 giving us 0
+ 9178 × 5000 what gives us 45890000

= 46716020
