Fix times symbol

Author: hollance

Array2D/README.markdown

@@ -4,7 +4,7 @@ In C and Objective-C you can write this,
 
 	int cookies[9][7];
 
-to make a 9⨉7 grid of cookies. This would create a two-dimensional array of 63 elements. To find the cookie at column 3, row 6, you'd write:
+to make a 9x7 grid of cookies. This would create a two-dimensional array of 63 elements. To find the cookie at column 3, row 6, you'd write:
 
 	myCookie = cookies[3][6];
 
@@ -100,6 +100,6 @@ Thanks to the `subscript` function, you can do the following to retrieve an obje
 let myCookie = cookies[column, row]
 ```
 
-Internally, `Array2D` uses a single one-dimensional array to store the data. The index of an object in that array is given by `(row ⨉ numberOfColumns) + column`. But as a user of `Array2D` you don't have to worry about that; you only have to think in terms of "column" and "row", and let `Array2D` figure out the details for you. That's the advantage of wrapping primitive types into a wrapper class or struct.
+Internally, `Array2D` uses a single one-dimensional array to store the data. The index of an object in that array is given by `(row x numberOfColumns) + column`. But as a user of `Array2D` you don't have to worry about that; you only have to think in terms of "column" and "row", and let `Array2D` figure out the details for you. That's the advantage of wrapping primitive types into a wrapper class or struct.
 
 And that's all there is to it.