Update README.md

fix cells number

test/LargeScaleTwoPhaseFlowSimulation/README.md

@@ -23,14 +23,14 @@ with inside:
 ```
 
 ## Test case dimensions
-The grid dimension is 2048x2048x10 so the test uses ~4,19e6 cells. You can increase or decrease the number of cells 
+The grid dimension is 2048x2048x10 so the test uses ~41.9e6 cells. You can increase or decrease the number of cells 
 in z dimension as you need. To change number of cells in z dimension change
 ```
 <origine>0 0 -100</origine>
 ```
 to
 ```
-<origine>0 0 -1000</origine>
+<origine>0 0 -1000</origine
 ```
 and
 ```
@@ -42,7 +42,7 @@ to
 ```
 the second number is the dimension in meters.
 
-The case has been tested up to 2048x2048x170 which correspond to 7.13e6 cells.
+The case has been tested up to 2048x2048x170 which correspond to 713e6 cells.
 This grid size generates a linear system which number of equations is closed 
 to the maximum supported by Alien and used Linear solver libraries.