//Your excel sheet (check extension)
Let>tmp=C:\...\Classeur1.xlsx

//Open the excel file and read cell A1 in sheet feuil1 into the variable strCell
XLOpen>tmp,1,xlBook
XLGetCell>xlBook,feuil1,1,1,strCell

//Look for a number in strCell. NM gives number of numbers found, M_1 gives first one found etc
// \d+ is RegEx language meaning one or more digits, ie a number in this case. 
RegEx>\d+,strCell,0,M,NM,0

If>NM>0
    //You need to change this part
    //and set focus on the web page
    //you are working with etc.

    MessageModal>Number is: %M_1%    
    SetFocus>Microsoft Excel*
    Wait>1
    Press>Down *%M_1%    
Else
    MessageModal>No Number found
Endif