Chef appeared for a placement test.

There is a problem worth X points. Chef finds out that the problem has exactly 10 test cases. It is known that each test case is worth the same number of points.

Chef passes N test cases among them. Determine the score Chef will get.

NOTE: See sample explanation for more clarity.

------ Input Format ------

• First line will contain T, number of test cases. Then the test cases follow.
• Each test case contains of a single line of input, two integers X and N, the total points for the problem and the number of test cases which pass for Chef's solution.

------ Output Format ------

For each test case, output the points scored by Chef.

------ Constraints ------

$1 ≤ T ≤ 100$
$10 ≤ X ≤ 200$
$0 ≤ N ≤ 10$
$X$ is a multiple of $10$.

----- Sample Input 1 ------
4
10 3
100 10
130 4
70 0

----- Sample Output 1 ------
3
100
52
0

----- explanation 1 ------
Test Case $1$: The problem is worth $10$ points and since there are $10$ test cases, each test case is worth $1$ point. Since Chef passes $3$ test cases, his score will be $1 \cdot 3 = 3$ points.

Test Case $2$: The problem is worth $100$ points and since there are $10$ test cases, each test case is worth $10$ points. Since Chef passes all the $10$ test cases, his score will be $10 \cdot 10 = 100$ points.

Test Case $3$: The problem is worth $130$ points and since there are $10$ test cases, each test case is worth $13$ points. Since Chef passes $4$ test cases, his score will be $13 \cdot 4 = 52$ points.

Test Case $4$: The problem is worth $70$ points and since there are $10$ test cases, each test case is worth $7$ points. Since Chef passes $0$ test cases, his score will be $7 \cdot 0 = 0$ points.

见题面

见题面