(0.5*10^5)^3*(4*10^3)^2
=(0.5*10^5)*(0.5*10^5)^2*(4*10^3)^2
=(0.5*10^5)*[(0.5*10^5)*(4*10^3)]^2
=(0.5*10^5)*(2*10^8)^2
=(0.5*10^5)*4*10^16
=0.5*4*10^5*10^16
=2*10^21
(0.5*10^5)^3*(4*10^3)^2
=(0.5*10^5)*(0.5*10^5)^2*(4*10^3)^2
=(0.5*10^5)*[(0.5*10^5)*(4*10^3)]^2
=(0.5*10^5)*(2*10^8)^2
=(0.5*10^5)*4*10^16
=0.5*4*10^5*10^16
=2*10^21