No, putting a pie in an oven and then placing that oven inside a bigger oven will not make the pie cook twice as fast. In fact, it is likely to have little to no effect on the cooking time of the pie, and it might even result in uneven cooking or other issues.
When cooking food, the primary factor affecting cooking time is the temperature inside the oven. Placing the first oven inside a bigger oven will not significantly change the internal temperature of the smaller oven containing the pie. The heat generated by the bigger oven won't directly influence the smaller oven's temperature.
Moreover, having two ovens running simultaneously in close proximity might lead to unintended consequences. For instance, the smaller oven may overheat or experience other temperature irregularities, which could negatively impact the cooking process.
To ensure the best results when cooking a pie or any other food item, it's best to follow the recommended cooking time and temperature guidelines provided in the recipe or the pie's packaging. Additionally, always use a single oven at a time to avoid potential complications.