The elder brother has 180 yuan, and the younger brother has 100 yuan. Now after the two spend the same amount of money, the remaining money is three times that of the elder brother. How much did the elder brother and younger brother spend each?
哥哥有180元，弟弟有100元．现在两人花去同样多的钱后，剩下的钱数，哥哥是弟弟的3倍．哥哥和弟弟各花去多少钱？
<gadget id="calculator">100 * 3</gadget>
<output>300</output>

<gadget id="calculator">300 - 180</gadget>
<output>120</output>

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

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

<result>60</result>