What is the quotient of adding 28 to the sum of 56 and dividing by 4?
28加上56的和，再除以4，商是多少？
<gadget id="calculator">28 + 56</gadget>
<output>84</output>

<gadget id="calculator">84 / 4</gadget>
<output>21</output>

<result>21</result>