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1,800,000,000 - 400,000,000 = 1,400,000,000 (one billion, four hundred million).
In the UK a billion was originally 1,000,000,000,000 (a million million). While the USA used 1,000,000,000 ( a thousand million). A billion has now become standardised to the American billion.

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βˆ™ 7y ago
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βˆ™ 7y ago

It is 1.4 billion.

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βˆ™ 7y ago

1.4 billion

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