Martin Q. Blank said:
Matt. 6:7 And when you pray, do not heap up empty phrases as the Gentiles do, for they think that they will be heard for their many words. 8 Do not be like them, for your Father knows what you need before you ask him.
By this logic, shouldn't you not pray at all?
The entire context around that verse is not to put on a show for the benefit of others around us. Prayer is to commune with God, not show off our piety for an audience.
At my church, public prayer by the pastors and anyone in leadership is usually very brief and to the point, with maybe direct quotation of a relevant verse. For example, at a mens night the prayer before the meal was basically just paraphrasing a verse:
"Thank you, Father, that you are the lord who blesses our food and water and takes sickness and disease away from our midst according to exodus 23:25. In the name of Jesus, Amen".
Conversely, whenever I go to my parents church in Dallas I felt like the prayers are at least 50% focused on the speaker hearing themself be pious. I know I'm being overly harsh, but coming from my church and our relative brevity in prayer its a stark contrast.