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diff --git a/prolog/problems/clp_r/megabytes_2/en.py b/prolog/problems/clp_r/megabytes_2/en.py
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+++ b/prolog/problems/clp_r/megabytes_2/en.py
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+id = 160
+name = 'megabytes/2'
+slug = 'convert mebibytes to megabytes'
+
+description = '''\
+<p>A <em>mega</em>byte is the SI unit meaning 10<sup>6</sup> bytes, while a <em>mebi</em>byte is the IEC unit meaning 2<sup>20</sup> bytes. Write the predicate <code>megabytes(SI, IEC)</code> that converts between the two using constraints.</p>
+<pre>
+  ?- megabytes(2, IEC).
+    IEC = 1.9073486328125.
+  ?- megabytes(SI, 2).
+    SI = 2.097152.
+</pre>'''
+
+hint = {}