It's hard to visualise numbers. You can see the figure but the value behind that can be much harder to imagine. We've never really evolved to do that.
You can imagine one penny, but what about 50 000?
You can imagine a $100 note, but what about $1 000 000 000 000 worth?
It's really hard to imagine the value of figures like these.
So if you're having trouble with maths, work harder. You need this in today's society.