Create a W|A widget for an expression?

[drewpear]

For the web, i host a calculator for determining the interior diameter of a sphere to resonate a given frequency and also the ability to create the spheres and generate stl files for 3d printing. i’m trying to create a widget to make the calculator easier and less clunky. There are two calculators. One for a sphere with a sound hole and one for a sphere with a tube to elongate the sound hole. The link to the calculator is here- Spherical Resonator Calculator. the two expressions i use for the calculators are,

17.87*((d/(f^2))^(1/3))

((3(d^2)(C^2))/(8L(f^2)*(3.14^2)))^(1/3)

where

d=diameter of sound hole

f=frequency to resonate

C=speed of sound

L=length of sound tube

in meters. both solve for the diameter of the sphere. i have been unable to create a widget with input fields for the variables. i’m not sure of the approach or correct settings for each entry when creating the widget.

any help would be appreciated.

thank you

[wolframcommunity (EDITORIAL BOARD)]

You have been sent a link pointing you to documentation on widget building:

Wolfram|Alpha: Making the world’s knowledge computable

Have you tried following it and what exactly did not work for you?

[drewpear]

thank you for your reply.

i did look through the tour.

i’m trying to build a widget from scratch.
here is what i’ve tried.

to start, i input one of the expressions and this is what came back

i chose to highlight the variables and made these settings. what to highlight, default value and interpretation i am unsure of.

i get this output and click next.

this is the result. the page hangs on computing and will not continue

thank you!