(something) is many times (more) than (something)

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.

the planets in the solar system

We call our sun and everything that orbits around it the "solar system".

The "planets" in our solar system include Earth, Mercury, Venus, Mars, Jupiter, Saturn, and Neptune.

We've just started to explore the other planets in the solar system.

(more) than (several things) put together

This phrase means that one person by himself is stronger than the combined force of three other people:

He's stronger than the three of you put together.

Here's another example of "___ than ___ put together":

The U.S. spends way more on its military than all of Europe put together.