Physics problem,help me out!?

The human eye is filled with a clear fluid, which is continuously being produced in the eye and simultaneously draining from the eye. Normal intraocular pressure is about 15 mmHg. If drainage becomes obstructed, the fluid aculates in the eye, resulting in an increase of intraocular pressure in the range 25 to 50 mmHg and the clinical onset of glaucoma. What is the pressure of 40 mmHg expressed in units of psi (pounds per square inch)? (Hint: 1 mmHg = 1 torr = 133 Pa = 0.0193 psi)