You can multiply items in pc craft

^{Edit by [Mojang] Mega_Spud (Jay Wells):}
Steps To Reproduce:

• Drag a stack of items across several inventory slots
• Double click one of those to group them together again
• You often end up with more than you started with (might take a few attempts)

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Original Description:
You can multiply items by your inventory. HOW TO REPRODUCE? Watch the video and find out how to play

Samsung galaxy j3