doc01 = {
const n1 = "n<sub>1</sub>"
const n2 = "n<sub>2</sub>"
return html`
<form action="javascript:void()" style="width: min-content">
<fieldset style="width: max-content; border-style: none none solid none;">
<label>${n1} = <input id="num1" type="number" value="0"></label>
<br>
<label>${n2} = <input id="num2" type="number" value="0"></label>
</fieldset>
<div style="margin: 0.5em">
${n1} + ${n2} = <output id="sum">0</output>
<button id="calc" style="float: right;">계산</button>
</div>
</form>`
}