Enter the x and z coordinates, and the yaw angle of any two eye of ender throws. This calculator will then give you the location of the stronghold. Due to how minecraft rounds the angle, having the two throws atleast 200 blocks apart will make it more accurate. Also, since strongholds generate only within approximately 25,000 blocks from 0,0 being within that region is recommended for best results. The more precisely you record the angle of the throws, the more accurate this calculator will be. If you dig straight down and do not find a stronghold, dig out within 50-100 blocks and you should find it.