The elder brother's money is three times that of the younger sister's. After the elder brother gives 20 yuan to the younger sister, the two have the same amount of money. How much money does the older brother have?
哥哥的钱是妹妹的3倍，哥哥给20元给妹妹后两人的钱就同样多了，哥哥原来有多少元．
<gadget id="calculator">20 + 20</gadget>
<output>40</output>

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

<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<result>60</result>