对于每一个测试用例，输出结果。（小数***）结果应四舍五入小数点后2位（当且仅当它不是一个整数------注意：如果结果不是小数就不要精确）。

For each case, print the operation result. The result should be rounded to 2 decimal places If and only if it is not an integer.

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允许装卸时间将精确到小数点后第五位，第六位小数则四舍五入。

Allowable lay time shall be expressed to the fifth decimal place, with the sixth decimal place being rounded up if five or greater and rounded down otherwise.

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显示单元格a1的内容四舍五入到小数点后一位。

Displays the contents of cell A1 rounded to one decimal place.

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