a,b = map(int,input().split()) wa = 0#敢えて-1している(ダメな方) a *= 10**52 ac = a//b+1#OKな方 cnt = a//b while abs(ac-wa)>1: mid = (wa + ac) //2 #print(ac,mid) #判定書く if b*mid > a: ac = mid else: wa = mid cnt += 1 ans = str(ac)[:-2] jg = len(ans)-51 if jg >= 0: kte = "" for i in range(len(ans)): kte += str(ans[i]) if i == jg: kte += "." print(kte) else: jg *= -1 kte = "0."+"0"*(jg-1) kte += ans print(kte)