A man is playing an arcade game. He starts with some money in his pocket. In the first 5 minutes, he was lucky and doubled his original money, but in the second 5 minutes, he lost 2 pounds. In the third 5 minutes, he doubled his remaining money, but soon lost another £2. Then he was lucky enough to double his remaining money, after which he lost another £2. At last he found that he had no money left. Excuse me, how much money did he bring with him at the beginning?
一个人正在玩一种娱乐游戏机，开始时他口袋里有一些钱．在开始5分钟内，他很幸运，将他原来的钱翻了一倍，但是在第二个5分钟里，他输了2英镑．在第三个5分钟内，他又将他剩下的钱翻了一倍，但很快他又输了2英镑．接着他又很幸运的将他剩下的钱翻了一倍，之后他又再次输了2英镑．最后他发现自己一分钱都不剩了．请问，开始时他身上带了多少钱？
<gadget id="calculator">8 + 4 + 2 + 0</gadget>
<output>14</output>

<gadget id="calculator">14 / 8</gadget>
<output>7/4 = around 1.75</output>

<result>7/4 = around 1.75</result>