This will look strange online in this reply, but open the file in Inkscape, it will be more clear...
This task is not much different than any other desktop operation: edit, copy (or "clone") and paste.
In Inkscape, the file now has circles added to a group of objects.
The group can be "cloned" and pasted in alignment with a grid that has been added to the document. View the grid with the # key.
Click on the group to select, find the Clone button on the toolbar and click it once, drag clone to next cell in the grid. Repeat.
When finished cloning all needed, select all objects ( CTRL+A ) and set document size to contents in the properties panel.
Not a free-lunch exactly, but easy from here and the best way to explain to a novice a little bit of vector graphics.
