Under optimal wind conditions, if her ship sails 4 hours with 1 sail, she will travel 4*25=<<4*25=100>>100 nautical miles.
Under optimal wind conditions, if her ship sails 4 hours with 2 sails, she will travel 4*50=<<4*50=200>>200 nautical miles.
In total, she will travel 100+200=<<100+200=300>>300 nautical miles.
If 1 nautical mile is equivalent to 1.15 land miles, then Buffy will travel 300*1.15=<<300*1.15=345>>345 land miles.
#### 345