if you cook the whole bag how many gallons of rice would you have? looking to fill a bath tub.

Earlier someone said that 15 pounds of rice will make 69.78 cups of rice. 16 cups in a gallon so 4.36 gallons of rice per back. Google says a bathtub holds at least 35 gallons so 8-10 bags oughta do it.

Is this a high glutinous rice used to make fermented rice wine?

No. This is a polished, medium grain sticky rice. This is for using as a rice to be served as a side with a meal. Because this is a sticky rice it will be easier to eat with Japanese style chopsticks. You need to look for a glutinous sweet rice for what you want to do.

where is product grown? Thank you.

I have a bag, and it says "Product of USA". Yet the distributor JFC international, distributes products from Japan and Asia. I haven't found where it says this rice is grown in California. However California is the 2nd largest producer of rice ,next to Arkansas, in the United States.

It is a medium white rice. You have to cook it. It is not A quick/minute rice. It is a sticky rice. Where it was grown should be on the products Amazon page.