Calculation: 6/3+(2+1).
计算：6/3+(2+1)．
<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<result>5</result>