#divContent > div {
  width: 100%;
  height: 40px;
  padding: 10px;
  margin: 10px;

  display: flex;
  justify-content: center;
  align-items: center; 
  /* border: 1px solid gainsboro; */
}

input[type=text] {
  width: 90%;
  height: 90%;
  text-align: center;
  font-size: large;
}

button {
  width: 20%;
  display: inline-flex;
  margin: 5px;
}