Hi,
If your images are 400px width ; you should modify the product page layout in order to give 400px for the image display.
In that case, displaying the price and the quantity selector might be place below (depending the total width you allow for the global product page).
But yes, if the container is less than 400px width and the image is bigger ; the image will overlaps the container, unless you place a CSS rule like explained in the other thread.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.