Can't get values for multiple checkboxes in html

I have a html table of all the items in in my sql table. Each item has a checkbox that, when selected, is supposed to give the value of the item name to the calculate route when I press the submit button. However, the submit button only submits one checkbox value even if multiple checkboxes are selected. How do I get it to submit the values of all the checkboxes that are selected, not just one checkbox.

<table style="width:100%" class="styled-table">
                <tr>
                <th>Selected</th>
                <th>Amount</th>
                <th>Name</th>
                <th>Typical values</th>
                <th>Unit of typical values</th>
                <th>Calories</th>
                <th>Carbs</th>
                <th>Fat</th>
                <th>Protein</th>
                <th>Salt</th>  
                <th>Sugar</th>
                </tr>

        <tr>
        <% availableFood.forEach(function(food_item){ %>
                <form method="POST" action="/topic7/mid-term/calculate"> 
                        <td><input type="checkbox" name="checkbox[]" value= <%= food_item.name %>></td>    
                        <td><input id="qty" type="text" name="qty" value="1" width="8" style="width: 30px;"/></td>
                        <td><%= food_item.name %></td>
                        <td><%= food_item.typical_values %></td> 
                        <td><%= food_item.unit_of_the_typical_value %></td>
                        <td><%= food_item.calories %></td>
                        <td><%= food_item.carbs %></td>
                        <td><%= food_item.fat %></td>
                        <td><%= food_item.protein %></td> 
                        <td><%= food_item.salt %></td> 
                        <td><%= food_item.sugar %></td>
        </tr>
                        <input type="submit" value="Calculate sum" />
        </form>
<% }) %>