Self-inductance when the number of turns is multiplied with the length unchanged

The same question, asked 2 times: 11 May 2023 S1*, 15 May 2023 S1. Every wording below, oldest first.

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Question 1
11 May 2023 S1
2 $When the number of turns in a coil is doubled without any change in the length of the coil, its self-inductance$
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Question 2
15 May 2023 S1
2 $When the number of turns in a coil are made 3 times without any change in the length of the coil, its self-inductance becomes$
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