Add 8 to a certain number, subtract 15, multiply by 6, and divide by 5 to get 18. What is this number?
某数加8、减15、乘6、除以5得18，这个数是多少？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">18 * (5/6)</gadget>
<output>15</output>

<gadget id="calculator">15 - 8</gadget>
<output>7</output>

<gadget id="calculator">15 + 7</gadget>
<output>22</output>

<result>22</result>