When x=2.6, what is the value of 8x+2x-2.6.
当x=2.6时，8x+2x-2.6的值是多少．
<gadget id="calculator">10 * 2.6</gadget>
<output>26</output>

<gadget id="calculator">26 - 2.6</gadget>
<output>23.4</output>

<result>23.4</result>