There are two brothers. The elder brother has three times as much money as the younger brother. If the younger brother gives the elder brother 6 yuan, then the elder brother has five times as much money as the younger brother. How much money does the older brother have?
有兄弟两人，哥哥所有的钱数是弟弟的3倍，若弟弟给哥哥6元，那么哥哥所有的钱数就是弟弟的5倍，问哥哥原来多少钱？
<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">30 + 6</gadget>
<output>36</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<result>54</result>