using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            comboBox1.SelectedIndex = 0;
            comboBox2.SelectedIndex = 0;
            textBox1.Text = "1";
        }
        private double getValue(string a, string b)
        {
            double finalValue = 1;
            double aValue = 1;
            double bValue= 1;
            if (a == "грамм")
                aValue = 1;
            if (b == "грамм")
                bValue = 1;
            if (a == "килограмм")
                aValue = 1000;
            if (b == "килограмм")
                bValue = 1000;
            if (a == "центнер")
                aValue = 100000;
            if (b == "центнер")
                bValue = 100000;
            if (a == "тонна")
                aValue = 1000000;
            if (b == "тонна")
                bValue = 1000000;

            finalValue = aValue / bValue;
            return finalValue;
        }
        private void button1_Click(object sender, EventArgs e)
        {
            if (!String.IsNullOrEmpty(this.textBox1.Text) || String.IsNullOrEmpty(this.textBox2.Text))
            {
                double result = 1;
                result = Convert.ToDouble(this.textBox1.Text) * getValue(this.comboBox1.Text, this.comboBox2.Text);
                this.textBox2.Text = Convert.ToString(result);
            }
        }

        
    }
}