body {
  font-family: arial;
  padding: 20px;
}

input {
  width: 50px;
}

h1 {
  font-size: 50px;
}

table {
  font-size: 30px;
}

input {
  font-size: 30px;
}

button {
font-size: 25px;
}

#Result {
  font-size: 30px;
}

#formule {
  width: 60%;
}

/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Firefox */
input[type=number] {
  -moz-appearance: textfield;
}

@media only screen
and (min-device-width : 320px)
and (max-device-width : 1024px)
{

  h1 {
    font-size: 35px;
  }
  table {
    font-size: 25px;
  }

  #formule {
    width: 100%;
  }

}