Time to Serve Customers

You are given a number of customers, each with a specific number of items that need to be processed. The system can process S items per minute. For each customer, the serving time is given by the formula:

\(T_i = \frac{items_i}{S}\)

where \(items_i\) is the number of items for the i-th customer. Your task is to compute the total time required to serve all customers:

\(Total\ Time = \sum_{i=1}^{N} \frac{items_i}{S}\)

Output the total time rounded to six decimal places.

inputFormat

The input consists of two lines. The first line contains two space-separated integers N and S, where N is the number of customers and S is the processing speed (items per minute). The second line contains N space-separated integers, where each integer represents the number of items for a customer.

outputFormat

Output a single line containing the total time required to serve all customers, rounded to six decimal places.

## sample

3 1
1 1 1

3.000000

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