Multipling dataframe column by float - pandas

Question

This is a piece of my dataframe called df:

       carrera   cinta1   cinta2
0          0.61  499.556  611.029
1         0.876  499.556  611.029
2         1.082  499.556  611.029
3         1.167  499.556  611.029
4         1.337    0.045  611.029

I need to mulitply the column 'carrera' by a float (in this case 0.2)

My dataframe comes from a list:

def calculo(self, datos):
        
        df2 = pd.DataFrame(datos)
        df2.columns = ['carrera', 'cinta1', 'cinta2']

        print(df2.dtypes)

Then I multiply the column by 0.2

df1 = df2['carrera']*0.2
print(df1)

This gives an error: can't multiply sequence by non-int of type 'float'

SOLVED

The data on the dataframe was an object type. When defining the dataset I added the following:

  df2 = pd.DataFrame(datos, dtype=float)