When accountant Wang checked out the account, he found that there was an extra 27 yuan on the account. Later, he found out that the decimal point of a sum of money was wrong.
王会计结账时，发现账面上多出了27元钱，后来发现是把一笔钱的小数点搞错了一位，原来这笔钱是多少元．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">27 / 9</gadget>
<output>3</output>

<result>3</result>