If a number is multiplied by 13, the result is 108 more than the original number. What is the original number? what is the correct formula
一个数乘13，得数比原来多108，原来的数是多少？正确的算式是多少
<gadget id="calculator">13 - 1</gadget>
<output>12</output>

<gadget id="calculator">108 / 12</gadget>
<output>9</output>

<result>9</result>