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As a Nike wearer might say, 'Just do it!'

Multiply the numbers, and multiply the units.


7 x 1 = 7. km x km = km-squared (square kilometres), a unit of area!


So, 7km x 1km suggests a rectangular area with a width of 1 km and a length of 7km. It's measure is therefore 7 square kilometres.


Incidentally, this principle works with lots of different units.

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12y ago

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