Simplify log5 log3 (243)

Please help ASAP! I absolutely do not understand this question. log5 is log with base 5, and log3 (243) is log base 3 with 243 in the middle. log3 (243) is next to log5 at the right.

I will give brainliest if you solve correctly! If you don't know the answer, please do not answer as I will waste 30 points if you answer incorrectly.

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Can someone help me with questions please too
Hope this is correct! I used an app called Cymath to solve it,i am not sure if it is correct. Please mark me as brainliest if this is correct!
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