출처 : http://cafe.naver.com/gogoomas/244870 System.Numerics 참조추가합니다 Imports System.Numerics Public Class Form1 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim st = New Stopwatch() st.Start() Dim a As BigInteger = 1 For abc = 1 To 10000 a *= abc Next MsgBox(st.ElapsedMilliseconds / 1000) TextBox1.Text = a.ToString End Sub E..