How do I make more starter?

I’m new to sourdough so plz be kind. So say I have 100g starter right. I do a one to one to one ratio so I add 100 g water and 100 g flour. Now I have 300 g of starter. Is there a way to quickly make more starter? If I had 100 g of starter. Could I add 300 g of water and 300 g of flour and now have 700 g of starter? I’m not sure if this makes sense. I’m just curious how I would make a bunch of starter at once so the next day I can make say four loaves of bread instead of one. (Idk if I did the grams right, like I said I’m new and still trying to understand).