请问如何把该LSP标注改为“米”为单位？

这是在国外找到的一个标注面积小程序，做规划时候很方便但是做建筑时候就成了毫米级的单位，请问如何缩小1000000倍？
谢谢各位老大！

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(defun c:at (/ area cth loc ss str th vevo)
(while
(setq ss (car (entsel "\nSelect a object")))
(setq vevo (vlax-ename->vla-object ss))
(setq area (vlax-get vevo 'area))
(setq loc (getpoint "\nClick location for text<0,0,0>: "))
(if (= loc nil)(setq loc '(0 0 0)))
(setq str (strcat "" (rtos area)))
(setq cth (rtos (getvar "textsize")))
(setq th (getdist (strcat "\nEnter new text height < " cth " > : ")))
(if (= th nil)(setq th cth))
(command "_text" loc th "" str 0)
) ; while
(princ)
) ; defun



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