Coarse grid size 5 by 5
Fine grid size 9 by 9
  0 KSP Residual norm 27.6245 
  1 KSP Residual norm 3.51127 
  2 KSP Residual norm 0.525499 
  3 KSP Residual norm 0.22871 
  4 KSP Residual norm 0.0455085 
  5 KSP Residual norm 0.019289 
  6 KSP Residual norm 0.00766009 
  7 KSP Residual norm 0.00181933 
  8 KSP Residual norm 0.000685033 
  9 KSP Residual norm 0.000256187 
Number of iterations = 9
