Solve the programming task below in a Python markdown code block.
Chef wants to gift C chocolates to Botswal on his birthday. However, he has only X chocolates with him.  
The cost of 1 chocolate is Y rupees. 

Find the minimum money in rupees Chef needs to spend so that he can gift C chocolates to Botswal.

------ 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, three integers C, X, and Y.

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

For each test case, output in a single line answer, the minimum money in rupees Chef needs to spend.

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

$1 ≤ T ≤ 100$
$1 ≤ C ≤ 100$
$0 ≤ X ≤ C$
$1 ≤ Y ≤ 100$

----- Sample Input 1 ------ 
2
7 5 5
10 1 1
----- Sample Output 1 ------ 
10
9
----- explanation 1 ------ 
Test Case $1$: Chef has to gift a total of $7$ chocolates out of which he has $5$ chocolates. Thus, Chef needs to buy $2$ more chocolates, which costs him $10$ rupees.

Test Case $2$: Chef has to gift a total of $10$ chocolates out of which he has $1$ chocolate. Thus, Chef needs to buy $9$ more chocolates, which costs him $9$ rupees.