Question 1208610
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You would use long division to divide 1 over 13.
13 goes out to the left, while 1 goes under the bar.


Here is a calculator that provides a step-by-step walkthrough 
<a href="https://www.calculatorsoup.com/calculators/math/longdivisiondecimals.php">https://www.calculatorsoup.com/calculators/math/longdivisiondecimals.php</a>
Adjust the drop-down menu for "decimal places" to 7 or larger.


The calculator will say that
1/13 = 0.<font color=red>076923</font><font color=blue>076923</font><font color=red>076923</font>... where "076923" repeats forever
The color coding is there to show when one block stops and the next begins.


The repetend is 076923
The last 3 digits are 9, 2, and 3.
A = 9
B = 2
C = 3
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