If 〇-●=12.5; 〇/●=6 then 〇+●=how much.
如果〇-●=12.5；〇/●=6那么〇+●=多少．
<gadget id="calculator">2.5 * 6</gadget>
<output>15</output>

<gadget id="calculator">2.5 + 15</gadget>
<output>17.5</output>

<result>17.5</result>