This is printed by PHP Echo

Toua Vue
Hello, Toua

Variable a = 10 and b = 30
10 is smaller than 30

30 is not smaller than 10

10 is not equal 30

10 is less than 30 and 10 is not equal 30

The OR operator is working as intended if this message appear

Addition: 40
Subtraction: -20
Multiplication: 300
Division: 0.33333333333333
Modulus: 10