issue to unzip the file *tgz file in recursive folder

Hi Folk,
I am a new in Linux. I want all unzip for all directory associated .

I have tried command find /home/pani/ -type f -name '*tgz' -print -exec -gunzip -r {} \;

above command is not working. Please help to resolve

/home/pani/a
-rw-r--r-- 1 pani devusers 534057 Mar 27 01:22 20210326004631.tgz
-rw-r--r-- 1 pani devusers 1952 Mar 27 01:24 20210325235417.tgz
-rw-r--r-- 1 pani devusers 253403 Mar 27 01:28 20210325221737.tgz
-rw-r--r-- 1 pani devusers 2922279 Mar 27 01:28 20210325221748.tgz
-rw-r--r-- 1 pani devusers 19927 Mar 27 01:29 20210325205201.tgz

/home/pani/b
-rw-r--r-- 1 pani devusers 534057 Mar 27 01:22 20210326004631.tgz
-rw-r--r-- 1 pani devusers 1952 Mar 27 01:24 20210325235417.tgz
-rw-r--r-- 1 pani devusers 253403 Mar 27 01:28 20210325221737.tgz
-rw-r--r-- 1 pani devusers 2922279 Mar 27 01:28 20210325221748.tgz
-rw-r--r-- 1 pani devusers 19927 Mar 27 01:29 20210325205201.tgz