how can add multi quantity to one product in magneto

hi everybody
i want to know about  "

how can add multi quantity to one  product in magneto

 "
i work in site одежда оптом and in the page of pruduct for example
http://savoy.com.ru/plat-e-gn-126.html
i want to have this example :one product and multi quantity  in magento
babak khaniAsked:
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babak khaniAuthor Commented:
thanks so much dear lenamtl but i want to do it in backend not front end ! i need code that can write my modul for it .
as you can seee in the site at now i did it but i need to do samething as same as example that i attach
in this like you can see what i did :
http://savoy.com.ru/plat-e-gn-126.html
lenamtlCommented:
Hi,

ok in the backend, where do you need it ?
do you need it to edit existing order or create order or quote , product page, product attribute?

Could you elaborate more...
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babak khaniAuthor Commented:
in need it in product page , i put this link http://savoy.com.ru/plat-e-gn-126.html that you can see this example but until now i can not find solve of it !!! /
of course i search in all place , i find several modul for it . but i need to do it my self
babak khaniAuthor Commented:
what i want to do , you can see in this site ... but this site is not in magento and i want to do it in magento http://gepur.ru/prilegayuschee/plate-10706/

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babak khaniAuthor Commented:
thanks so much for answer
my problem solve with this module
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