Daniel has exactly $20$ pieces of candy. He has to divide them equally among his $3$ sisters. What is the least number of pieces he should take away so that he could distribute the candy equally?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Daniel has exactly $20$ pieces of candy. He has to divide them equally among his $3$ sisters. What is the least number of pieces he should take away so that he could distribute the candy equally?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
2 \text{ pieces}
Daniel has exactly $20$ pieces of candy. He has to divide them equally among his $3$ sisters. What is the least number of pieces he should take away so that he could distribute the candy equally?
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