JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="">
	<form>
		<label class="item item-input item-select">
			<div class="input-label" aria-label="Tipo Limpeza">Nº Quartos:
			</div> <select name="n1" ng-model="n1" style="color: #17BCB6;">
				<option value=""></option>
				<option value="1">1</option>
				<option value="2">2</option>
				<option value="3">3</option>
				<option value="4">4</option>
				<option value="5">5</option>
				<option value="6">6</option>
				<option value="7">7</option>
				<option value="8">8</option>
				<option value="9">9</option>
				<option value="10">10</option>
		</select>
		</label> <label class="item item-input item-select">
			<div class="input-label">Nº Banheiros:</div> <select name="n1"
			ng-model="n2" style="color: #17BCB6;">
				<option value=""></option>
				<option value="1">1</option>
				<option value="2">2</option>
				<option value="3">3</option>
				<option value="4">4</option>
				<option value="5">5</option>
				<option value="6">6</option>
				<option value="7">7</option>
				<option value="8">8</option>
				<option value="9">9</option>
				<option value="10">10</option>
		</select>
		</label> <label>
			<h1 style="text-align: right; padding-top: 10px; color: #28a54c;">Multiplicado por 10: {{10*(n1+n2)}}</h1>
      <h1 style="text-align: right; padding-top: 10px; color: #28a54c;">Soma dos dois valores: {{ (n1*1) + (n2*1) }}</h1>
		</label>
	</form>
</div>