What is crazy is there are 3 stones that size there with a weight of 800 tonnes each, there is a 1,600t stone in a nearby quarry that never made it out of the quarry. There are a few other stones over 800t there as well.
Humanity today had trouble moving a 340t stone 106 miles. It took 11 days at 7mph to move it in place for the Levitated Mass art installation.
In the late 1700s Russia moved the Thunder Stone, a 1,500t rock that was carved down to 1,200t over the course of a 9 month journey to transport it 6km. They used only manpower to move it across land 150m a day with a special sled that rode on a track that used 6" diamter bronze balls to roll. The barge that carried it across water was specially made and was supported by two warships.