The period is also used as a decimal point.
句号也可用作十进制的小数点。
Floating point is a very similar concept, except that computers use binary rather than decimal as their base.
浮点是一个非常类似的概念，除了计算机使用二进制而不是十进制作为基础。
We need to be accurate to two decimal places (e.g. in a simple accounting package), scale everything up by 100, and convert it back to floating point as late as possible.
我们处理小数的时候要精心些，比方说我们在做一个简单的统计程序时，要限制结果不能超过100，要尽可能晚的把它转化成浮点数。
For floating-point Numbers, you place a decimal as the separator between the whole part of the number and the fraction.
对于浮点数，您将在整数部分和小数部分之间放置小数点。
One takes a double-precision floating point as input, another takes an integer and a scale factor, and another takes a String representation of a decimal number.
其中一个构造函数以双精度浮点数作为输入，另一个以整数和换算因子作为输入，还有一个以小数的String表示作为输入。
Internally, BigDecimal is represented as an arbitrary-precision unscaled value and a scale factor, which represents how many places to move the decimal point left to obtain the scaled value.
在内部，可以用任意精度任何范围的值和一个换算因子来表示BigDecimal，换算因子表示左移小数点多少位，从而得到所期望范围内的值。
Output will consist of a single line containing the desired area written as a succession of eight (8) digit fields with two (2) digits after the decimal point.
只有一行输出，将求出的面积按8位数字输出，且小数点后只保留2位（译注：前面不够8位的以空格填充）。
Output will consist of a single line containing the desired area written as a succession of eight (8) digit fields with two (2) digits after the decimal point.
只有一行输出，将求出的面积按8位数字输出，且小数点后只保留2位（译注：前面不够8位的以空格填充）。
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