Assalamu 'alaykum wa rahmatullahi wa barakatuhu
We have to be aware and careful of such claims of Qur'aan "Miracles", because although they seem amazing and miraculous, we have to actually look into if there is a basis in these ideas, and if any such correlation was made by the scholars of Islaam or the pious predecessors of the past who were well versed and knowledgeable in the Qur'aan.
If there is evidence and it is backed by solid proof, then alhamdulillah we take it, but this issue with counting certain words like day, or sea in the Qur'aan and putting them together to find equality, balance or importance was brought about as a new idea, and has in fact been discussed previously on the forum.
Please refer to the thread regarding it before inshaAllaah and it should provide further insight:
Miracles in the Qur'aan!
May Allaah bless you for your good intentions in posting, and guide us all to what is correct. Ameen
wasalam