Xiaohua made 6.50 yuan more than 3 times more than Xiaogang. After they each bought a 2.50 yuan storybook, Xiaohua made 8 times as much money as Xiaogang. How much did Xiaogang sell scraps?
小华卖废品的钱比小刚的3倍多6.50元，两人各买一本2.50元的故事书后，小华的钱就是小刚的8倍，小刚原来卖废品卖了多少元？
<gadget id="calculator">8 * 2.5</gadget>
<output>20</output>

<gadget id="calculator">6.5 - 2.5</gadget>
<output>4</output>

<gadget id="calculator">20 + 4</gadget>
<output>24</output>

<gadget id="calculator">8 - 3</gadget>
<output>5</output>

<gadget id="calculator">24 / 5</gadget>
<output>24/5 = around 4.8</output>

<result>24/5 = around 4.8</result>