Congcong and Xiaoxiao share 100 yuan. If Congcong gives Xiaoxiao 10 yuan, they will have the same amount of money. It turns out how much Congcong has.
聪聪和笑笑共有100元钱，如果聪聪给笑笑10元后，两人的钱就一样多．原来聪聪有多少元．
<gadget id="calculator">10 + 10</gadget>
<output>20</output>

<gadget id="calculator">100 + 20</gadget>
<output>120</output>

<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<result>60</result>