After adding a 0 at the end of a number, the resulting number is increased by 117, what is the original number?
在一个数的末尾添上一个0后，得到的数比原来增加117，原来的数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">117 / 9</gadget>
<output>13</output>

<result>13</result>