<div class="product">
  
  <label for="">Value (£)
  <input type="number" value="99.99" min="0" step="1" /> <button type="button">Update</button></label>
  
  <div class="content">
    
  <img src="//placehold.it/800x600" alt="Test" />
  
  <div class="text">
  <h1>Awesome Product</h1>
  <h2>£<span id="price"></span></h2>
  
  <p id="euroPrice"></p>
  
    <div class="description">
    Wow this is the best product ever! Lorem ipsum dolor sit amet, consectetur adipisicing elit. Placeat recusandae error ipsum debitis id, animi, veritatis enim dolores! Iusto iste obcaecati incidunt libero placeat vitae totam reiciendis quod a, fugiat!
    
      </div>
    </div>
  </div>
</div>
body {
  background: #f5efef;
}
.product {
  margin: 2em auto;
  padding: 0 2em;
  max-width: 800px;
  
  @media all and (min-width: 600px) {
    .content {
      display: flex;
      align-items: flex-start;
    }
  }
  
  h1 {
    margin-top: 0;
  }
  
  img {
    width: 100%;
    max-width: 100%;
    margin-bottom: 1em;
    
    @media all and (min-width: 600px) {
      max-width: 300px;
      margin-right: 2em;
    }
    
  }
  
  label {
    display: block;
    margin-bottom: 2em;
  }
}
View Compiled
$('#price').html($('input').val())

// Set the current price
var price = $('input').val()
		
// Returns the current (approximate) price in Euros
function getEuros() {
  return (Currency.convert(price, 'GBP', 'EUR')).toFixed(2);
}

function updateEuros() {

// looks for an element with an ID of "euroPrice" and replaces the content with a sring
  document.getElementById('euroPrice').innerHTML = '€' + getEuros() + ' EUR' 
    
}

$('button').on('click', function() {
  price =  $('input').val();
  updateEuros();
  $('#price').html($('input').val())
})

updateEuros();
View Compiled
Rerun