Long multiplication: Difference between revisions

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> (long-multiply (expt 2 64) (expt 2 64))
340282366920938463463374607431768211456
 
=={{header|Crystal}}==
 
<lang ruby>require "big"
 
a = 2.to_big_i ** 64
 
puts "#{a} * #{a} = #{a*a}"'
</lang>
{{out}}
<pre>
18446744073709551616 * 18446744073709551616 = 340282366920938463463374607431768211456</pre>
 
=={{header|D}}==
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