Describes the cause and action for error messages.
Error Message(English)：
unable to convert text to number
Fix text-formatted numbers by applying a number format - Excel
https://support.office.com/en-ie/article/fix-text-formatted-numbers-by-applying-a-number-format-6599・・・
Converting Forced Text to Numbers (Microsoft Excel)
https://excelribbon.tips.net/T010205_Converting_Forced_Text_to_Numbers.html
Can't convert text to numbers. Tried everything. : excel - Reddit
https://www.reddit.com/r/excel/comments/8imcd1/cant_convert_text_to_numbers_tried_everything/
Excel: convert text to number with formula and other ways - Ablebits.com
https://www.ablebits.com/office-addins-blog/2018/07/18/excel-convert-text-to-number/
Convert text to number in Excel, value function. - Ablebits.com
https://www.ablebits.com/office-addins-blog/2014/10/28/excel-convert-text-number/
Excel Data Entry Fix Numbers Formatted as Text - Contextures
https://www.contextures.com/xlDataEntry03.html
Fixing Numbers Stored as Text | Getting Data onto a Sheet in Excel ...
http://www.informit.com/articles/article.aspx?p=2027553&seqNum=11
Three Ways to Convert Text-Based Numbers to Values | AccountingWEB
https://www.accountingweb.com/technology/excel/three-ways-to-convert-text-based-numbers-to-values
How to change or convert text to number in Excel? - ExtendOffice
https://www.extendoffice.com/documents/excel/582-excel-change-text-to-number.html