Why this code is not correct? Area of a Circle

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
const double pi = 3.14;
double radius;

//your code goes here
string str = Console.ReadLine();
radius = Covert.ToDouble(str);
radius *= radius;
double area = pi * radius;
Console.WriteLine(area);

}
}
}

Answer 1

You misspelled "Convert"

Answer 2

To find of area Circle

Answer 3

Oh.. Thank you very much!

Answer 4

What is your task here?