How to get last list numbers from total number in jquery?

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jQuery

i have total records 128 or any number.
My Requirement is need to get remaining numbers from the divided number by 25.

example : 128/25 = 5 => remaining numbers 126,127,128

that i need to get 126 from remaining values

What I have tried:

I have tried but not working

var num = 128/25;

num = Math.round(num);
num= (num*25);
    


alert(num);