"0" is not showing in this Area lisp

Found this area lisp somewhere & did some minor edit.

But there is a problem. if the area is example 0.11, the text ouput will be .11m2.

Can some tell me what to amend to have it show as 0.11m2

thanks

(defun drtxt (/ tx ls vl lt ht lb hb nr pt)
 (setq tx (strcat "";;;;add text between "";;;;
      (rtos (/ (getvar "area") 1000000) 2 2)
      "m²"
      )   
)
 (setq ls (list (cons 1 tx))
     vl (textbox ls)
     vl (cadr vl)
     lt (car vl)
     ht (cadr vl)
     vl (grread T)
     nr (car vl)
     pt (cadr vl)
 )
 (princ "\nInsert Point: ")
 (while (/= nr 3)
   (command "redraw")
   (grdraw pt (setq pt (polar pt 0 lt)) 7)
   (grdraw pt (setq pt (polar pt (* pi 0.5) ht)) 7)
   (grdraw pt (setq pt (polar pt pi lt)) 7)
   (grdraw pt (polar pt (* pi 1.5) ht) 7)
   (setq vl (grread T)
     nr (car vl)
     pt (cadr vl)
   )
   ) ;end while function
(command "-mtext" pt "w" 0 tx "")
(redraw)
) ; end drtxt function

(defun c:AA ()
 (setvar "cmdecho" 0)
 (while (setq et
      (car
            (entsel "\nSelect polyline: ")
        ) ;end car function
    ) ;end setq function
 (command "area" "o" et)
 (drtxt)
 ) ; wnd while funtion

(setvar "cmdecho" 1)
(princ)

) ; end c:pla function

(defun drtxt (/ tx ls vl lt ht lb hb nr pt)
 (setq tx (strcat "";;;;add text between "";;;;
      (rtos (/ (getvar "area") 1000000) 2 2)  "m²" ) )
 (if (= (substr tx 1 1) ".")(setq tx (strcat "0" tx)))
)

Hi,

Its a System Variable issue: DIMZIN