After moving the decimal point of a number one place to the left, the resulting number is 13.68 smaller than the original number. What is the original number?
将一个数的小数点向左移动一位后，所得到的数就比原来的数小13.68，原来的数是多少．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">13.68 / (9/10)</gadget>
<output>15.2</output>

<result>15.2</result>