dict1 = {'a' :{'irrelevant': 1}, 'b' :{'cat': 2}, 'c': {'train': 3}}
     dict2 = {'a2' : 4, 'b2' : 5, 'd2': 10}

     multiplied_values = []

     for key, value in dict1:
           for k, v in value:
               for key2, value2 in dict2:

                   if key == str(key2.split('2')[0]):
                          multiplied_values.append(v*value2)
     print(multiplied_values)