
Perform 4D tensor-matrix multiplication of two tensors:
$$
C[b][i][j][k] = \sum_{l=0}^{L-1} A[b][i][j][l] \cdot B[l][k]
$$

## Input
- Tensor $A$ of size $B \times I \times J \times L$
- Matrix $B$ of size $L \times K$

## Output
- Tensor $C$ of size $B \times I \times J \times K$

## Notes:
- All tensors $\text{A}$, $\text{B}$, and $\text{C}$ are stored in row-major order
- This problem is adapted from [KernelBench](https://github.com/ScalingIntelligence/KernelBench/blob/main/KernelBench/level1/11_4D_tensor_matrix_multiplication.py)

Rank	User	Runtime	GPU	Date
1	sqdshguy	707.71 μs	B200	5 months ago
2	Gusanidas	746.96 μs	H100	5 months ago
3	justinms	794.47 μs	H100	18 days ago
4	sagarreddypatil	967.65 μs	H100	12 months ago
5	648trindade	1.57 ms	B200	8 months ago
6	648trindade	1.74 ms	H100	9 months ago
7	648trindade	1.76 ms	H200	9 months ago
8	Firojpaudel	2.20 ms	H100	12 months ago
9	a-hamdi	2.42 ms	H100	12 months ago
10	harmya	2.83 ms	H100	about 1 year ago
11	Gusanidas	4.97 ms	T4	5 months ago
12	codingwithsurya	5.94 ms	H100	9 months ago
13	Firojpaudel	18.66 ms	T4	12 months ago
14	a-hamdi	20.15 ms	T4	12 months ago
15	harmya	23.01 ms	T4	about 1 year ago
16	pan-samuel	33.22 ms	B200	6 months ago
17	ShlokVFX	33.70 ms	H100	12 months ago