Loop is not incrementing

I am new to javascript.

I have to create a function that returns the next multiples of 5 based on a given number.But my loop repeats the information, it doesn´t increment the result.What am I doing wrong?

function proS (num, mult){
    let arr = []

for (var i = 1; i <= mult; i ++){
arr.push(Math.ceil(num / 5) * 5)
}
return arr
}

proS(6,4)

returns [10,10,10,10]