how many times larger is 60,000,000,000,000,000,000,000,000,000 than 30,000,000,000,000,000,000,000,000.

2倍

what does that mean

It means that 60,000,000,000,000,000,000,000,000,000 is twice as large as 30,000,000,000,000,000,000,000,000. In other words, if you double the second number, you get the first number.