The elder brother and the younger brother have the same amount of chocolates. The elder brother eats 7 pieces, and the younger brother eats 19 pieces. The leftover chocolates of the elder brother are three times that of the younger brother. How many pieces of chocolate do they each have?
哥哥和弟弟有同样多的巧克力，哥哥吃了7块，弟弟吃了19块以后，哥哥剩下的巧克力是弟弟的3倍，他们原来各有多少块巧克力？
<gadget id="calculator">19 - 7</gadget>
<output>12</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 + 19</gadget>
<output>25</output>

<result>25</result>