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hundreds of thousands of millions of years ago is too far in the past - the universe is only 13.75 billion years old!However I know what you are asking and the organisms divided into three parts were the "trilobites". They lived about 500 million years ago.
256 divided by 2 divided by 2
4
200 divided by 2 1000 divided by 10 10000 divided by 100 500 divided by 5 OR 400 divided by 4, etc.
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