当你用21除以4时，结果是一个实型数(一个带小数点的数)。
When you divide 21 by 4, the result is a real number (a number with a fraction).
换句话说，它们是角度度量，以带小数部分的度数表示，不是直线距离(采用米、英尺或类似的单位)。
In other words, they are angular measures, in degrees with decimal fraction, not linear distances (in meters, feet, or similar units).
这里有个例子，数据透视表显示服务器上设计的数字格式——在本例中，为带两位小数位数的美元。
Here is an example of a PivotTable displaying number formatting as defined on the server - in this case dollars with two decimals.
利用同余及带余除法解决：小数展开式最简单的分数；
In this paper, by means of the division algorithm and congruence, firstly we discuss the fractions with the simplest decimal expansions;
利用同余及带余除法解决：小数展开式最简单的分数；
In this paper, by means of the division algorithm and congruence, firstly we discuss the fractions with the simplest decimal expansions;
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