You can also find an example of using Inputs.bind here:
https://observablehq.com/framework/javascript#inline-expressions
The input and its reactive variable are declared in JavaScript:
const numberInput = Inputs.input(0);
const number = Generators.input(numberInput);
And then you can embed in Markdown like so:
${Inputs.bind(html`<input type=range style="width: 120px;">`, numberInput)}
And likewise reference the reactive value as:
${number}