11 X 11 = 121111 X 111 = 123211111 X 1111 = 123432111111 X 11111 = 123454321111111 X 1111111 = 12345654321
Even better when the reverse side of the wrapping paper has gridlines so you do nice straight cuts every time. Hnnnnnnggggg.
11 X 11 = 121
111 X 111 = 12321
1111 X 1111 = 1234321
11111 X 11111 = 123454321
111111 X 1111111 = 12345654321