On the planet Mathemarvia, Sarah, Emilio, and their native friend Rawk are running through a cave to reach the treasure. Suddenly, they come to three iron doors. “Quick!” screeches Rawk, who looks like a parrot with a squirrel’s tail, “You can get through the door with the greatest number on it!”

Door 1 says: three times the sum of three hundreds, six ones, and five tens
Door 2 says: zero times the sum of 1 ten thousand and 3 thousands
Door 3 says: eight ones, one thousand, five tens, six hundreds

Which door should they open?