Hello guys could help me? I created a field called physical resistance should be autocalculado, its value would be the sum of the physical attribute and the level of the character, however, the field is not automatically calculated, what could I be doing wrong? <span><label for="level">Level:</label></span> <input type="number" name="attr_level"/> <span><label for="physical">Physical:</label></span> <input value="0" type="number" name="attr_physical"/> <span><label for="rp">Physical Resistance:</label></span> <input name="attr_rp" type="number" value="@{attr_physical}+@{attr_level}" disable="true"/>