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run code in 150+ php & hhvm versions
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<?php $a = 6.022e+23; $m = 1.6605e-24; echo "The molar mass is ".($m) * ($a);
based on UBuHR
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
The molar mass is 0.9999531