Excel公式不起作用——不能识别数字

I've pasted some numbers on Excel spreadsheet and wanted to do some calculations with it. The problem is that Excel isn't recognizing the numbers. I've already tried several methods to convert them into numbers and none of them works: paste/special multiplying by 1; formating each cell to the number/scientific number format. And there isn't also an error message on the top right corner of each cell like I've read on the internet indicating that there is a number written as text. If I retype each number, Excel recognizes it.I've pasted some numbers on Excel spreadsheet a