The elder brother has 21 yuan more than the younger brother, and the younger brother has less money (1/4) than the elder brother. How much money does the elder brother have?
哥哥比弟弟多21元，弟弟比哥哥的钱少(1/4)，哥哥有多少钱？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">21 / (1/4)</gadget>
<output>84</output>

<result>84</result>