Understanding one trillion

Leaders of the world's largest economies have agreed to tackle the global financial crisis with measures worth $1 trillion.

But how big is one trillion? Use this guide to put the number in context.

If the area of a doormat is equal to one, the total area of the United Kingdom is a trillion times bigger - 1,000,000,000,000

• Doormat area: 0.24 sq m
• United Kingdom total land area: 244,820 sq km