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Hi there. Do you want to know something really cool? If so, keep reading. Multiplying any two digit number by 11 is easy. For example, let's do 35*11. Place a space between 3 and 5 (3_5). Add 3 and 5 (3_5). Place the sum in the space (385). Now try 84. You may notice how 8 plus 4 equals a two digit number (12). No worries, carry the 1 over to get an answer of 924.