Simple calculation: 0.5*16+0.5*71+0.5*13.
简算：0.5*16+0.5*71+0.5*13．
<gadget id="calculator">0.5 * 16</gadget>
<output>8</output>

<gadget id="calculator">0.5 * 71</gadget>
<output>35.5</output>

<gadget id="calculator">0.5 * 13</gadget>
<output>6.5</output>

<gadget id="calculator">8 + 35.5 + 6.5</gadget>
<output>50</output>

<result>50</result>