# Unknown number 24

I think the number:

a - is the same as the square area that has the 12th circumfence. What is this number?

b - its half is 7 times bigger than its quarter. Is this the number?

a - is the same as the square area that has the 12th circumfence. What is this number?

b - its half is 7 times bigger than its quarter. Is this the number?

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