////Given
m=1.675*10**-27                                 //mass of neutron in kg
v=1.4*10**-10                                   //de broglie wavelength in m
h=6.63*10**-34                                  //Js

//Calculation 
K=(h**2/(2*m*(v**2)))/(1.6*10**-19)

//Result
printf("\n Kinetic energy of neutron is  %0.2f *10**-2 ev",K*10**2)