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Multiplying upto 5 digit numbers by 100001

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 × 100001 = 1200012
    79 × 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 × 100001 = 38600386
    914 × 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 × 100001 = 629506295
    8106 × 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


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