If 2x+x=9, what is 8x+1.5x+3 equal to
如果2x+x=9，那么8x+1.5x+3等于多少
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">1.5 * 3</gadget>
<output>4.5</output>

<gadget id="calculator">24 + 4.5 + 3</gadget>
<output>31.5</output>

<result>31.5</result>