I discover a new element, rarecatmeowium, on an expedition to the Marianas Trench and collect 25 g of this new element to study it further. When I return to the lab, 38 days later, only 21 g of the element remaining. Suspecting radiation, I use a Geiger counter and confirm that rarecatmeowium is radioactive. I need at least 5 g to perform all of my diagnostic tests on this new element. How many more days do I have in the lab to complete the tests before I don't have enough element to study (5 g)?