There is a small number, if its decimal point is moved one bit to the left, the resulting number will be 15.3 less than the original number, what should the original number be?
有一小数，如果把它的小数点向左移动一位，所得的数就比原数减少15.3，原数应该是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">15.3 / 9</gadget>
<output>1.7</output>

<gadget id="calculator">10 * 1.7</gadget>
<output>17</output>

<result>17</result>