###Human: The sky currently has 4 times as many cirrus clouds as cumulus clouds, and 12 times as many cumulus clouds as cumulonimbus clouds.  If the sky currently has 3 cumulonimbus clouds, how many cirrus clouds are in the sky at this moment?, ### Assistant: The sky has 3*12=36 cumulus clouds.
The sky has 4*36=144 cirrus clouds. 
 So the answer is :  144