.title {
  margin-bottom: 20px;
  text-align: center;
}

.division-sign {
  text-align: center;
  font-size: 35px;
}

button {
  height: 50px;
}

input {
  height: 50px;
}

.answer {
  font-size: 40px;
  font-weight: bold;
  text-align: center;
}

body {
  margin: 30px;
}


.article {
  padding: 3% 10% 0;
}