#calculator{
  border: 1px solid rgb(172, 170, 170);
  border-radius: 10px;
  width: 280px;
  height: 530px;
  margin: 60px auto;
  padding: 20px 25px;
}

.input{
  border-radius: 3px;
  border-color: gray;
  width: 95%;
  height: 10%;
  font-size: 40px;
}

#buttons{
  margin: 15PX 20PX;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
}

.button{
  width: 70px;
  height: 70px;
  margin: 4px 4px;
}


/* sir's code */
/* #calculator{
  border: 1px solid rgb(172, 170, 170);
  border-radius: 5px;
  width: 250px;
}

.input{
  margin: 10px;
  width: 87%;
  font-size: 35px;
}

#buttons{
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.button{
  width: 60px;
  height: 60px;
  margin: 3px;
} */