Is this a contradiction or am I reading it wrong? Genesis 5:28

[Anomalocaris]

Hello dudes.
It has been a year since I visited the forums.


Genesis 5:28 KING JAMES VERSION
And Lamech lived an 802 years, and begat a son: {5:29} And he called his name Noah, saying, This [same] shall comfort us concerning our work and toil of our hands, because of the ground which the LORD hath cursed. {5:30} And Lamech lived after he begat Noah 585 years, and begat sons and daughters: {5:31} And all the days of Lamech were 777 years: and he died. {5:32} And Noah was 500 years old: and Noah begat Shem, Ham, and Japheth.

^^^^^Hmmmm Lamech lived 802 y and later on it says he lived 777 y and he died.

He said all the days were 777 years.   Maybe those years just had more days.

Let’s see, when did each year have 380 days so that 777 years would have had as many days as 802 years do now?  

Hmmm, according to some remarkable sedimentary disposition that exhibit individual layers laid down with each tide, a year had around 380 days somewhere between the Devonian and Carboniferous ears about 350-400 million years ago.

Thus, if we believe Snow Track’s assertion that the genesis is an “flawlessly” accurate account of the history of the earth, then we may infer Lamech was a reptile.