Input file "input.xml":

```
<integer name="leftValue">30</integer>
<integer name="rightValue">580</integer>
<integer name="rightValueDefault">495</integer>

```

I want every numeric value multiplied by 2:

```
<integer name="leftValue">60</integer>
<integer name="rightValue">1160</integer>
<integer name="rightValueDefault">990</integer>

```

How to do that?