The father and son jointly opened a restaurant. They calculated the turnover of the day together at night, and found that there was an excess of 47.61 yuan on the account. Later, it was found that the decimal point of a sum of money was wrong.
父子二人合开一家餐厅，他们晚上一起计算当天的营业额，发现账面上多出47.61元，后来发现是一笔钱的小数点点错了一位，原来这笔钱是多少元．
<gadget id="calculator">47.61 / 9</gadget>
<output>5.29</output>

<result>5.29</result>