/// <summary>
/// Calculate formula
/// </summary>
/// <exception cref="VariableNotFoundException"></exception>
/// <exception cref="InvalidCastException"></exception>
/// <exception cref="ExtraTypeNoFreeIdException"></exception>
/// <exception cref="ExtraTypeIdNotFoundException"></exception>
public double CalcNumber(string formula, IVariablesContainer variables)
{
var formulaNodes = _formulaCache.GetFormulaNodes(formula);
var wrapper = VariablesSource.Create(variables);
return(OnCalcNumber(formulaNodes.Nodes, wrapper));
}