In One Thousand Ten Days of Combat in Ukraine, Russia has taken an Additional Less Than 1% of Ukraine.
Since mid November '22, Russia has taken 5842 square Kilometers.

At this rate, it would take ~80 million Russian Soldiers to take Ukraine.
Even with Diminishing Returns, cut in half, it would take ~40 million Russians to take Ukraine.

And Ukraine is getting better on the ground, as Russia runs out of Armor, Arty, Commanders, and Aircraft.