Sequence

I have a sequence defined as follows:

• All even-numbered terms are equal to the previous term multiplied by 2.
• All odd-numbered terms are equal to the previous term divided by 3.

Create a program that reads the first term a of this sequence and outputs the sum s (10) from the first term to the tenth term.

Input

The input consists of multiple test cases. For each test case, a real number a (1.0 ≤ a ≤ 10.0) representing the first term of the sequence is given in one row.

The number of test cases does not exceed 50.

Output

Print s (10) on one line for each test case.

The output may contain an error of 0.000001 or less.

Example

Input

1.0 2.0 3.0

Output

7.81481481 15.62962963 23.44444444

inputFormat

outputFormat

outputs the sum s (10) from the first term to the tenth term.

Input

The input consists of multiple test cases. For each test case, a real number a (1.0 ≤ a ≤ 10.0) representing the first term of the sequence is given in one row.

The number of test cases does not exceed 50.

Output

Print s (10) on one line for each test case.

The output may contain an error of 0.000001 or less.

Example

Input

1.0 2.0 3.0

Output

7.81481481 15.62962963 23.44444444

样例

1.0
2.0
3.0

7.81481481
15.62962963
23.44444444

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