The two brothers used to have the same amount of RMB. Later, the older brother bought 6 books at an average of 8.4 yuan each, and the younger brother bought 3 pens at 1.2 yuan each. Now the younger brother has three times as much money as the older brother. How much did the two brothers originally have?
兄弟两人原来有同样多的人民币，后来哥哥买了6本书，平均每本8.4元，弟弟买了3支笔，每支笔1.2元，现在弟弟的钱是哥哥的3倍．兄弟两人原来各有多少元？
<gadget id="calculator">8.4 * 6</gadget>
<output>50.4</output>

<gadget id="calculator">1.2 * 3</gadget>
<output>3.6</output>

<gadget id="calculator">50.4 - 3.6</gadget>
<output>46.8</output>

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

<gadget id="calculator">46.8 / 2</gadget>
<output>23.4</output>

<gadget id="calculator">23.4 + 50.4</gadget>
<output>73.8</output>

<result>73.8</result>