Usages of по
Я хочу научиться готовить борщ по традиционному рецепту.
I want to learn to cook borscht according to the traditional recipe.
По карте видно, что наш дом на востоке города, а университет на западе.
From the map it is clear that our house is in the east of the city and the university is in the west.
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We have an entire course teaching Russian grammar and vocabulary.