上下走了多少層 (13623)

F2=TEXT(SUMPRODUCT(LEFTB(D2:E2,2)*{-1,1}),"往上走0層;往下走0層")

另解{="往"&TEXT(NPV(-2,--SUBSTITUTE(D2:E2,"楼",)),"[>]上走0;下走0")&"層"