如何将pandas数据框中的特定行乘以条件

I have a column which of 10th marks but some specific rows are not scaled properly i.e they are out of 10. I want to create a function that will help me to detect which are <=10 and then multiply to 100. I tried by creating a function but it failed. Following is the Column: data['10th']

0           0
1           0
2           0
3       10.00
4           0
        ...  
2163        0
2164        0
2165        0
2166    76.50
2167    64.60
Name: 10th, Length: 2168, dtype: object