#[05AB1E](https://github.com/Adriandmen/05AB1E/wiki/Commands), 2 [bytes](https://github.com/Adriandmen/05AB1E/wiki/Codepage)

    ƶJ

[Try it online](https://tio.run/##yy9OTMpM/f//2Dav//998pOSKgE) or [verify all test cases](https://tio.run/##yy9OTMpM/V9TVmmvpPCobZKCkn3l/2PbvP7r/A/PqOQK9q4sSOXyyU9KiuRyVEjMS1FwAgA).

**Explanation:**

<!-- language-all: lang-python -->

    ƶ   # Multiply each character in the (implicit) input-string by its 1-based index
     J  # Join the list of substrings together to a single string
        # (after which the result is output implicitly)