JSFiddle - React, Tailwind, and code Playground

HTML

<table id="tableReport" class="tablePanier">
  <tbody>
    <tr>
      <th class="titles">GenCod</th>
      <th class="titles">Auteur</th>
      <th class="titles">Titre</th>
      <th class="titles">Quantite</th>
      <th class="titles">PrixTTC</th>
      <th class="titles">TotalPrixTTC</th>
      <th class="titles">Delete</th>
    </tr>
    <tr class="line_hover">
      <td>9782871421801</td>
      <td>CHAPMAN , JANE</td>
      <td>OEUFS DE PAULETTE (LES)</td>
      <td>
        <input
          id="Quantity9782871421801"
          onClick="ReCalculateTotal(9782871421801);"
          value="1"
          min="1"
          type="number"
          name="fname"
          style=" width: 100px;  text-align: center; "
        />
      </td>
      <td id="Prix_TTC">
        <input
          id="Prix_TTC9782871421801"
          type="text"
          value="5.2"
          name="Prix_TTC"
          style=" width: 100px;  text-align: center; "
          disabled=""
        />
      </td>
      <td>
        <input
          id="Total9782871421801"
          type="text"
          name="fname"
          value="5.2"
          style=" width: 100px;  text-align: center; "
          disabled=""
        />
      </td>
      <td>
        <a href="#">
          <input
            type="button"
            value="Retirer"
            name="fname"
            style=" width: 100px;  text-align: center; "
        /></a>
      </td>
    </tr>
  </tbody>
</table>

JavaScript

function ReCalculateTotal(id) {
    var prix_unitaire = document.getElementById('Prix_TTC'+ id).value;
    var quantite = document.getElementById('Quantity'+ id).value;
    document.getElementById('Total'+ id).value = Math.round((prix_unitaire * quantite) * 1000) / 1000;
  }