diff --git a/matrix.c b/matrix.c
index bfc9173..8df1d37 100644
--- a/matrix.c
+++ b/matrix.c
@@ -93,5 +93,29 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
-    return matrix1;
-}
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+    if (matrix1.cols != matrix2.rows) {
+        Matrix invalid = {0,0, NULL};
+        return invalid;
+    }
+
+    Matrix result = createMatrix(matrix1.rows, matrix2.cols);
+    if (result.buffer == NULL)
+    return result;
+
+
+    for (unsigned int i = 0; i < matrix1.rows; i++){
+	    for (unsigned int j = 0; j < matrix2.cols; j++){
+	        *(result.buffer + (i * result.cols + j)) = 0;
+
+			for (unsigned int k = 0; k < matrix1.cols; k++){
+			    *(result.buffer + (i * result.cols + j)) += *(matrix1.buffer + (i * matrix1.cols + k)) * *(matrix2.buffer + (k * matrix2.cols + j));
+       		}
+    	}
+	}
+
+return result;
+}
+
+    //Für imageInput.c
+    //size_t fread(void *buffer, size_t elementSize, size_t count, FILE *FILE_HEADER_STRING)
+    //elementSize = width * height;
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