The naughty calculation "247+(301+368)" got 470, is he right? write your thought down.
淘气计算"247+(301+368)"得到的结果是470，他算得对吗？写出你的想法．
<gadget id="calculator">301 + 368</gadget>
<output>669</output>

<gadget id="calculator">247 + 669</gadget>
<output>916</output>

<result>916</result>