Rounding to the nearest 10 or 100 guided

This was inspired by John Ulbright's applet [url=https://www.geogebra.org/m/qDUeV4Qc]https://www.geogebra.org/m/qDUeV4Qc[/url][br]I used his work as a mentor applet in order to learn some coding.
[size=150][color=#0000ff]Round 327 to the nearest 10. Explain your process.[/color][/size]
[size=150][color=#0000ff]Round 327 to the nearest 100. Explain your process.[/color][/size]
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情報: Rounding to the nearest 10 or 100 guided