The decimal point of a number moves one place to the left, which is 2.25 less than the original number. What is the original number?
一个数的小数点向左移动一位，比原来的数小了2.25．原数是多少？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">2.25 / 9</gadget>
<output>0.25</output>

<gadget id="calculator">0.25 * 10</gadget>
<output>2.5</output>

<result>2.5</result>