Rebar unit weight

This application is used to calculate the rebar unit weight for any diameter you want, just enter the diameter you want, the sample length and weight have been entered, then click the button, the result will appear to you as follows:
() Ideal unit weight: x kg/m.
() Your unit weight: x kg/m.
() Percentage of your product: x% of x kg/m.
With the ability to share the result in the form of text.

Fix bugs.