A number multiplied by 8 is 84 more than the original number, what is the original number?
一个数乘8后比原数多了84，原来的数是多少？
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">84 / 7</gadget>
<output>12</output>

<result>12</result>