Add 3 consecutively to 3 to get 27, how many times do you need to add.
3连续加3，得出27，需要加多少次．
<gadget id="calculator">27 / 3</gadget>
<output>9</output>

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<result>8</result>