It is known that 2x=8, so how much is 4x+2*0.8=
已知2x=8，那么4x+2*0.8=多少
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">2 * 0.8</gadget>
<output>1.6</output>

<gadget id="calculator">16 + 1.6</gadget>
<output>17.6</output>

<result>17.6</result>