Calculator of numbers in various number systems.
Adding, subtracting, multiplying, and dividing numbers in a column. Moreover, numbers can be entered in different number systems.
.  .  
+  1  1  1  0  0  0  0  1 
1  0  0  1  1  1  0  1  
1  0  1  1  1  1  1  1  0 
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