n,l,v,r,k=map(int,input().split());n=(n+k-1)//k;a=(n-1)*(r-v)/(v+r);print(l/r/(n-a)*(n+a))343B - Alternating Current | 758B - Blown Garland |
1681B - Card Trick | 1592A - Gamer Hemose |
493D - Vasya and Chess | 1485A - Add and Divide |
337B - Routine Problem | 1392D - Omkar and Bed Wars |
76E - Points | 762C - Two strings |
802M - April Fools' Problem (easy) | 577B - Modulo Sum |
1555B - Two Tables | 1686A - Everything Everywhere All But One |
1469B - Red and Blue | 1257B - Magic Stick |
18C - Stripe | 1203B - Equal Rectangles |
1536A - Omkar and Bad Story | 1509A - Average Height |
1506C - Double-ended Strings | 340A - The Wall |
377A - Maze | 500A - New Year Transportation |
908D - New Year and Arbitrary Arrangement | 199A - Hexadecimal's theorem |
519C - A and B and Team Training | 631A - Interview |
961B - Lecture Sleep | 522A - Reposts |