Update README.md

README.md

@@ -16,6 +16,8 @@ pycuda, skcuda #if you use GPU for preparing Ajb
 This is to calculate energy dnsity on Carbon and Hydrogen atom of CH4 with grid settings:
 Legendre quadrature (200 radial points) and Lebedev quadrature (noted as 031, 350 angular points).
 
-
+```shell
+# cd ch4_200_031/
+```