If 15+x=28, what is the value of 1.5x+8?
如果15+x=28，那么1.5x+8的值是多少．
<gadget id="calculator">28 - 15</gadget>
<output>13</output>

<gadget id="calculator">1.5 * 13</gadget>
<output>19.5</output>

<gadget id="calculator">19.5 + 8</gadget>
<output>27.5</output>

<result>27.5</result>