The existing content of data.txt looks like this:

1.3, 1.5

2.3, 2.7

Use Python to modify the content of data.txt so that its content looks like below:

1.3, 1.5

2.3, 2.7

1.3, 1.5

2.3, 2.7

1.3, 1.5

2.3, 2.7

So, you need to find a way to insert the existing content two more times.