Calculator options:
  n: push number
  +: add
  -: subtract
  *: multiply
  /: divide
  s: square root
  p: print stack
  x: exit

Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
10
Option (n, +, -, *, /, s, p, x):
10
8
9
Option (n, +, -, *, /, s, p, x):
18
Option (n, +, -, *, /, s, p, x):
27
Option (n, +, -, *, /, s, p, x):
27
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
581
Option (n, +, -, *, /, s, p, x):
581
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
20
Option (n, +, -, *, /, s, p, x):
20
581
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
3.4596e+10
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
180000
180000
3.4596e+10
20
581
Option (n, +, -, *, /, s, p, x):
3.24e+10
Option (n, +, -, *, /, s, p, x):
0.936524
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
0.0634755
Option (n, +, -, *, /, s, p, x):
0.251944
Option (n, +, -, *, /, s, p, x):
Enter number to push:
Option (n, +, -, *, /, s, p, x):
25.1944
Option (n, +, -, *, /, s, p, x):
1.25972
Option (n, +, -, *, /, s, p, x):
1.25972
581
Option (n, +, -, *, /, s, p, x):
582.26
Option (n, +, -, *, /, s, p, x):
24.1301
Option (n, +, -, *, /, s, p, x):
Goodbye.