OET interlinear NUM 15:12

uW Translation Notes:

Note 1 topic: figures-of-speech / yousingular

אֲשֶׁ֣ר תַּעֲשׂ֑וּ כָּ֛כָה תַּעֲשׂ֥וּ

which/who prepare so do

The word you is plural here and in verses 13–16 because Yahweh is addressing all the Israelites, so use the plural form in your translation if your language marks that distinction.

Note 2 topic: figures-of-speech / explicit

כַּ⁠מִּסְפָּ֖ר אֲשֶׁ֣ר תַּעֲשׂ֑וּ כָּ֛כָה תַּעֲשׂ֥וּ לָ⁠אֶחָ֖ד כְּ⁠מִסְפָּרָֽ⁠ם

according,the_number which/who prepare so do for,one according,to_of,their_number

The implication is that each animal that is offered must have its own prescribed grain and wine offerings. You could include this information if that would be helpful to your readers. Alternate translation: [According to the number of animals that you offer, thus you shall do for each individual animal according to their number]

Note 3 topic: figures-of-speech / explicitinfo

כַּ⁠מִּסְפָּ֖ר אֲשֶׁ֣ר תַּעֲשׂ֑וּ כָּ֛כָה תַּעֲשׂ֥וּ לָ⁠אֶחָ֖ד כְּ⁠מִסְפָּרָֽ⁠ם

according,the_number which/who prepare so do for,one according,to_of,their_number

It might seem that the expression According to the number that you do, thus you shall do for the one according to their number contains extra information that would not be natural to express in your language. If so, you could shorten it. Alternate translation: [According to the number that you do, thus you shall do for each one]