Multiplying a 2-, 3-, 4-, or 5-digit number
                by 100001

    1. The product of a 2-digit number and 100,001 is:

first the two digits,
then three zeros,
then the two digits again.

   Examples:

12 x 100001 = 1200012
79 x 100001 = 7900079

    2. The product of a 3-digit number and 100,001 is:

first the three digits,
then two zeros,
then the three digits again.

   Examples:

386 x 100001 = 38600386
914 x 100001 = 91400914

    3. The product of a 4-digit number and 100,001 is:

first the four digits,
then one zero,
then the four digits again.

   Examples:

6295 x 100001 = 629506295
8106 x 100001 = 810608106

    4. The product of a 5-digit number and 100,001 is:

first the five digits,
then the five digits again.

   Examples:

12345X100001 = 1234512345
98765X100001 = 9876598765

Your friends will need a BIG calculator to keep up with you when you announce these products!