Seen sir

@Akinola Ajayi congrats , please check your wallet

Two of you got it right while @Onuora Chidera got it right first @Akinola Ajayi got it right in an efficient way as stated in the question.

So the mark goes to @Akinola Ajayi

5*2^10
5*1024
5120

2^10= 2×2×2×2×2×2×2×2×2×2= 1024
1024+1024+1024+1024+1024
= 5120