There were 200 students on a field playing football. Suddenly a military plane flew by, and 3/4 of the students looked up. How many eyes saw the airplane?
If there were 200 students on the field and 3/4 of the students looked up at the flying plane, 3/4*200 = <<3/4*200=150>>150 students saw the plane.
Since each student has two eyes, the number of eyes that looked at the plane is 2*150 = <<2*150=300>>300 years.
#### 300