clear
//
//
//

//Variable declaration    
b=2.92*10^-3;      //value of b(mK)
lamda=4900*10^-10;      //wavelength(m)

//Calculations
T=b/lamda;          //temperature(K)

//Result
printf("\n temperature is %0.0f K",T)
printf("\n answer in the book is wrong")