How to do something with "zenme"

怎么走? is "how do I get there?", 怎么说? is "how do you say it?". 怎么 goes directly in front of the verb.

As always with Chinese question words, the word order doesn't change — 怎么 simply occupies the adverb slot. There's no inversion the way English flips "do you".

怎么 in front of a whole clause can also mean "how come", a complaint rather than a genuine question. That's an HSK 2 point.