Multiplying all values in IEnumerable<int>

I have the following code and I am trying to work out how to multiply all values in my IEnumerable<int>.

I thought there might by a Multiply method like there is with Sum. I guess I could do a foreach over each item but these days this seems tedious.

Any suggestions?

//1:2:6
string[] pkgratio = comboBox1.SelectedRow.Cells["PkgRatio"].Value.ToString().Split(':');
var ints = pkgratio.Select(x => int.Parse(x));         

int modvalue = ints....