Test 3: Testing main.py output...
SUCCESS: main.py prints the correct message!
Output was: Calculator ready!

--- Running Verification Checks ---
Add 5 + 3: 8
Subtract 10 - 4: 6
Multiply 6 * 7: 42
Divide 10 / 2: 5.0
Divide 8 / 0: Error: Division by zero
--- Verification Complete ---
Main output test passed!