clear
//Given
ni=2.5*10**19                           ///m**3
e=1.6*10**19
ue=0.36                                //m**2/volt sec
uh=0.17              

//Calculation
a=ni*e*(ue+uh)

//Result
printf("\n Conductivity is %0.3f  S/m", a*10**-38)