title: Excel VBA formula insert in current cell
body: <p>Due to beginner for VBA, I am in a difficult to find this codes.
  I need to create 'Command Button' to insert formula according to 
  current cell location. 
  Eg. If current cell location is S7, need to get formula in to it '=K7*L7'. 
  Current cell location change all the time. Multiplication of Column K and L fixed.
  Please help me to write this codes. </p>