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A. Multiplying a number that is less than 91 by 101101 is very simple. Just follow the following steps:
1. Write down the number.
2. Multiply the number by 11 and write it down.
3. Write down the number again.
Ex [1] 45 x 101101 =_________.
a) Write 45.
b) 45 x 11 = 495. Write 495. (See Multiplying by 11)
c) Write 45.
d) The answer is 4549545.
Ex [2] 75 x 101101 =_________
a) Write 75.
b) 75 x 11 = 825. Write 825. (See Multiplying by 11)
c) Write 75.
d) The answer is 7582575.
B. This method is useful since it is used in Multiplying by 14443 part H.