Was going 100mph. my gas pedal got stuck. I pulled it it broke, how do I fix it?

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I pressed the gas quickly, it got stuck at 100mph. I stopped the car two feet on brake. Pulled gas pedal to try to release it and it broke into a few pieces. Hanging by a cable. Do I need to buy two parts sensor and pedal? My engine revs up high on its own when I start my car HELP PLEASE ??