12*21 = 252
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1.75 x 12 = 21
10 x 21 = 210 with a remainder of 12
take your number that will be effected by the exponent, and multiply it by itself how many times the exponent stands for so if you had 122 you would do 12 x 12 so if you had 215 you would do 21 x 21 x 21 x 21 x 21 to get 4084101
-3
x ≠11 9 + x = 21 9 + x - 9 = 21 - 9 x = 12