Move the decimal point of a one-digit number to the right to get a new number. The new number is 25.2 greater than the original number. What is the original number?
把一个一位小数的小数点向右移动一位，得到一个新数，新数比原数大25.2，原数是多少？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">25.2 / 9</gadget>
<output>2.8</output>

<result>2.8</result>