If the decimal point of a number is moved one bit to the right, the number is increased by 31.5, which is . How many
一个数的小数点向右移动一位，这个数就增加了31.5，这个数是．多少
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">31.5 / 9</gadget>
<output>3.5</output>

<result>3.5</result>