Both Huang Ming and Zhang Liang had accumulated some pocket money, and the ratio of the money they accumulated was 9:5. In the charity event, Huang Ming donated 48 yuan, and Zhang Liang donated 20 yuan. At this time, their surplus The amount of money is equal, how much money did Huang Ming have?
黄明和张亮都积攒了一些零用钱，他们所积攒的钱数的比是9：5，在献爱心活动中，黄明捐了48元钱，张亮捐了20元钱，这时他们的剩余钱数相等，黄明原来有多少钱？
<gadget id="calculator">48 - 20</gadget>
<output>28</output>

<gadget id="calculator">9 - 5</gadget>
<output>4</output>

<gadget id="calculator">28 / 4</gadget>
<output>7</output>

<gadget id="calculator">9 * 7</gadget>
<output>63</output>

<result>63</result>