Final answer:
To cook at medium heat with the highest number on the heat setting knob being 7, set the knob to around 3 or 4, which is approximately halfway between the minimum and maximum settings.
Explanation:
In this case, the highest number on the heat setting knob is 7. To cook at medium heat, typically, you would set the knob to about halfway between the minimum and maximum settings. Since the maximum is 7, the knob should generally be set around 3 or 4 for medium heat.
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