After adding a 0 at the end of a number, what is the number that is 135 more than the original number?
一个数在它的末尾添上一个0后，比原数多135，这个数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">135 / 9</gadget>
<output>15</output>

<result>15</result>