36.53

Calculate the product of all the elements in an array.

**Input:**

The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case consist of two lines . The first line of each test case contains an integer N.The second line of each test case contains N space separated integers denoting elements of the array A[ ].

**Output:**

For each test case in a new line print the product of all elements.

**Constraints:**

1 ≤ T ≤ 50

1 ≤ N ≤ 10

1 ≤ A[i] ≤ 5

**Example:**

**Input:**

2

5

1 2 3 4 5

10

5 5 5 5 5 5 5 5 5 5

**Output:**

120

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