Xiao Ming and Xiao Gang have a total of 108 yuan. Xiao Ming used 80% of his own money, and Xiao Gang used 75% of his own money. The money left by the two is exactly the same. How much money did Xiao Ming have?
小明和小刚共有108元钱，小明用去自己钱数的80%，小刚用去自己钱数的75%，两人所剩的钱数正好一样多，小明原有多少钱？
<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">108 * (5/9)</gadget>
<output>60</output>

<result>60</result>