It is stipulated that a△b=(b+a)*b, then (2△5)△5=how much.
规定a△b=(b+a)*b，那么(2△5)△5=多少．
<gadget id="calculator">2 + 5</gadget>
<output>7</output>

<gadget id="calculator">7 * 5</gadget>
<output>35</output>

<gadget id="calculator">35 + 5</gadget>
<output>40</output>

<gadget id="calculator">40 * 5</gadget>
<output>200</output>

<result>200</result>