How many divisors of 24 are there?
24的约数有多少个．
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>