You probably know that you can use the word "twice" to talk about a value that is double some other value:
I'm almost twice as heavy as she is.
When one value is 3x, 4x, 5x another value, you can say this:
The average salary in Singapore is five times the average in my country.
The phrase "many times ___" can be used to talk about a number that is even higher:
You're many times more likely to die in a car accident than in a terrorist attack in this part of the world.