h1 {  
      text-align: center;  
      padding: 23px;  
      background-color: skyblue;  
      color: white;  
      }  
    
  #clear{  
  width: 270px;  
  border: 3px solid gray;  
      border-radius: 3px;  
      padding: 20px;  
      background-color: red;  
  }  
    
  .formstyle  
  {  
  width: 300px;  
  height: 530px;  
  margin: auto;  
  border: 3px solid skyblue;  
  border-radius: 5px;  
  padding: 20px;  
  }  
    
    
    
  input  
  {  
  width: 20px;  
  background-color: green;  
  color: white;  
  border: 3px solid gray;  
      border-radius: 5px;  
      padding: 26px;  
      margin: 5px;  
      font-size: 15px;  
  }  
    
    
  #calc{  
  width: 250px;  
  border: 5px solid black;  
      border-radius: 3px;  
      padding: 20px;  
      margin: auto;  
  }