A steel wire is drawn from an initial diameter  of 10 mm to a final diameter  of 7.5 mm. The half cone angle  of the die is 5^o and the coefficient of friction  between the die and the wire is 0.1 The average of the initial and final yield stress  is 350 MPa. The equation for drawing stress  (in MPa) is given as:

The drawing stress (in MPa) required to carry out this operation is _________ (correct to two decimal places).