12/5+13/5=how much/5.
12/5+13/5=多少/5．
<gadget id="calculator">12 / 5</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">13 / 5</gadget>
<output>13/5 = around 2.6</output>

<gadget id="calculator">(12/5) + (13/5)</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>