sharepoint online – How to insert multiple values into one column separated by semicolumn

I have a single line of text field titled ‘NOTIFICATION NO’ with the following column validation:

=OR(LEN((NOTIFICATION NO.))=0,AND(LEN((NOTIFICATION NO.))=9,MID((NOTIFICATION NO.),1,3)="500",ISNUMBER((NOTIFICATION NO.)+0),ISERR(FIND(".",(NOTIFICATION NO.))),ISERR(FIND(",",(NOTIFICATION NO.))),ISERR(FIND("$",(NOTIFICATION NO.))),ISERR(FIND("+",(NOTIFICATION NO.))),ISERR(FIND("-",(NOTIFICATION NO.))),ISERR(FIND(" ",(NOTIFICATION NO.)))))

How to insert two or more values separated by semicolon (;) satisfying the above validation condition.

For example: “500123456;500567890;500765456”