Just using rough numbers. Average star radius ~ 400,000km. Average star distance ~ 5 light years = 100 trillion km

It's hard to get an average galaxy size as there are lots of much smaller faint dwarf galaxies and when to decide the edge of a galaxy. But say average galaxy ~ 1/3 radius of milky way ~ 14,000 light years. Average distance between galaxies ~ 1 million lights years

So stars (compared to their radius) are relatively about 3.5 million times further away from each other than galaxies are away from other galaxies