Calculation: 1+2+3+4+5+6+7+8+9+10+11.
计算：1+2+3+4+5+6+7+8+9+10+11．
<gadget id="calculator">1 + 11</gadget>
<output>12</output>

<gadget id="calculator">11 / 2</gadget>
<output>11/2 = around 5.5</output>

<gadget id="calculator">12 * (11/2)</gadget>
<output>66</output>

<result>66</result>