Solve the programming task below in a Python markdown code block.
There are N bikes and M cars on the road.

Each bike has 2 tyres.
Each car has 4 tyres.

Find the total number of tyres on the road.

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

- The first line will contain T - the number of test cases. Then the test cases follow.
- The first and only line of each test case contains two integers N, M.

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

For each test case, output in a single line,  the total number of tyres on the road.

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

$1 ≤ T ≤ 1000$
$0 ≤ N, M ≤ 100$

----- Sample Input 1 ------ 
2
2 1
3 0

----- Sample Output 1 ------ 
8
6

----- explanation 1 ------ 
Test Case $1$: There are $2$ bikes and $1$ car. Each bike has $2$ tyres, so there are $2\cdot 2 = 4$ bike tyres. Similarly, each car has $4$ tyres, so there are $1\cdot 4 = 4$ car tyres. Adding the tyres of all vehicles, we get $4+4=8$ tyres in total.

Test Case $2$: There are $3$ bikes and $0$ cars. Each bike has $2$ tyres, so there are $3\cdot 2 = 6$ bike tyres. There are no cars, so there are $0\cdot 4 = 0$ car tyres. Adding the tyres of all vehicles, we get $6+0=6$ tyres in total.