What is the distance between Euston Road and St Pancras railway station in kilometers?

How far is Euston Road, the important thoroughfare in central London, England and forms part of the A501 from St Pancras railway station, also known as London St Pancras and since 2007 as St Pancras International, the terminus celebrated for its Victorian architecture measured in The kilometre (American spelling: kilometer), symbol km, the unit of length in the metric system, equal to one thousand metres and is therefore exactly equal to the distance travelled by light in free space in of a seconds?

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Show reasoning Reasoning

I followed this chain of reasoning:

I know from locally stored knowledge that:
51°31'39"N is the latitude of Euston Road ([fact: ["151829897@trueknowledge.com"]])

51°31'48"N is the latitude of St Pancras railway station ([fact: ["2747163938@trueknowledge.com"]])

0°07'53"W is the longitude of Euston Road ([fact: ["151829905@trueknowledge.com"]])

0°07'30"W is the longitude of St Pancras railway station ([fact: ["2747163942@trueknowledge.com"]])

By calculation (generator: ["distance_between3@trueknowledge.com"]) I know that:
0.5218273221 kilometres is the distance between Euston Road and St Pancras railway station

By calculation (generator: ["second_parameter@trueknowledge.com"]) I know that:
kilometre is the second parameter of 0.5218273221 kilometres

I know from locally stored knowledge that:
Fact 1: 1 is the multiplier that converts kilometre and kilometre ([fact: ["684486512@trueknowledge.com"]])

Fact 1 is true for all time ([fact: ["689997328@trueknowledge.com"]])

By calculation (generator: ["timeperiodtopoint@trueknowledge.com"]) I know that:
Fact 1 is true at June 18th 2013, 03:40:03

By calculation (generator: ["now@trueknowledge.com"]) I know that:
The current time is June 18th 2013, 03:40:03

By calculation (generator: ["first_parameter@trueknowledge.com"]) I know that:
0.5218273221 is the first parameter of 0.5218273221 kilometres

By calculation (generator: ["product@trueknowledge.com"]) I know that:
0.5218273221 is the product of 1 and 0.5218273221

By calculation (generator: ["class_parametered_object@trueknowledge.com"]) I know that:
length is the class of the parametered object 0.5218273221 kilometres

By calculation (generator: ["parametered_object_corresponding_to@trueknowledge.com"]) I know that:
0.5218273221 kilometres is the parametered object corresponding to length and 0.5218273221 and kilometre

By calculation (generator: ["equivalent_to6@trueknowledge.com"]) I know that:
Fact 2: 0.5218273221 kilometres is equivalent to 0.5218273221 kilometres

Fact 2 is true at June 18th 2013, 03:40:03

Fact 2: kilometre is the unit used in 0.5218273221 kilometres

I used the following facts to provide this answer:

51°31'39"N is the latitude of Euston Road

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51°31'48"N is the latitude of St Pancras railway station

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0°07'53"W is the longitude of Euston Road

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0°07'30"W is the longitude of St Pancras railway station

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1 has always been the multiplier that converts kilometre and kilometre and will be forever

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