Once numbers reach the hundreds, the stars all come out for each place value. This allows the reader to know which number is what to allay confusion.
The pattern continues with stars. If you see four stars then you can assume that this flag represents a number in the thousands. Likewise a flag with five stars represents a number in the ten-thousands. Further a flag with six stars represents a number in the hundred-thousands. Finally a flag with seven stars represents a number in the millions.
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