A 3 by 3 matrix in matA
Matrix operations use two matrices with 3 rows and 3 columns. Press 
, then 
, 
for the entry screen. Enter the dimensions: 3 rows, 3 columns, and 
. The first row is 7, 4, 5: 7, , 4, , 5, . The second row is 2, 3, 0: 2, , 3, , 0, . The third row is 8, 1, 9: 8, , 1, , 9, . Press to leave the entry screen; , 
, 
stores it in mat A, in place of the old one.