I am stuck near the end of this challenge. I’ve done the math and my answers for the 4 stones should be correct, but I can’t always see everything that great on my iPad. I watched the only walkthrough I could find and cannot see the numbers on the stones. I have 6, 5, 9, 8. Does anyone know what the numbers should be? It’s a large room with many equations. 1564 our of 2156 tiles. I don’t know how else to describe it. TIA!