[請問] question about software can do some image spliting

[officium (officium)]

Sorry that I cannot type in Chinese.... :(

I am trying to find a software can split my image into 4*6 inch photo size
but all the free software I could find online only spliting image
base on the final number of pictures you want or the pixel for each picture you
want.
I am not familiar with image editing so not so sure how to do.
The only thing I want is to print out my works as 4*6 photo size with
reasonable image quality and number of picture (from 4-25 pictures for
each image), but I don't know how to do.
Does anybody have any suggestion?
Couple you please email me at [email protected]
It's really hard to get onto ptt since there's only one extremely old laptop with
chinese decoding system here....
Thank you so much in advance!!!!!!

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→ web2312:對...因為一張圖(某像素)切成4*6 "inch"的圖 跟dpi有關...
→ web2312:所以通常應該是決定每張圖的pixel
→ web2312:然後設定分割後的每張圖(特定pixel)去印在4*6 inch的各張
→ web2312:圖上...
→ web2312:如果以印表機600dpi來算 一張4*6 inch的圖 需要2400*3600
→ web2312:pixels