calculating lot size

Hello,

I need help please. I want to calculate lot size. What is wrong whith the following code?

 double risk = ( riskAmount / stopLossDistance ) / 10;

            Print("Risk amount: {0}, Stop Loss Distance: {1}, Lot: {2}", riskAmount, stopLossDistance, risk);
            

             Print("Pip Value: {0}", Symbol.PipValue);

            // var lotSize = risk / Symbol.PipValue;

            // var lotSize = Math.Round(risk);

            //Print("Lot Size: {0}", Symbol.QuantityToVolumeInUnits(lotSize));

            return Symbol.QuantityToVolumeInUnits(risk);

Thanks