On the Gemini website, it doesn't use a code execution tool, for example when calculating multiplications of big numbers, and gets the wrong result. When I explicitly ask it to use a code execution tool it shows some Python code, again gives a wrong result, and the reasoning shows it that it merely "simulated" the execution of the script instead of actually running the code.
In AI Studio however you can toggle code execution and it works perfectly.
Is Gemini (website/app) not supposed to have a code execution tool like ChatGPT and Grok do?