Data type Problem

Question

i need to multiple this two values.Coding is

[code]

int s = Convert.ToInt32(txtIntW.Text);

double i =6.5;

//lblResultW = Convert.ToInt32(s) + Convert.ToInt32(i);

lblResultW.Text =i * s;

[/code]

but its showing Error.please help me to solve this.Thx