If ((x+6)/4)=5, then 2x+3=how much.
如果((x+6)/4)=5，那2x+3=多少．
<gadget id="calculator">6 / 4</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">5 - (3/2)</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(7/2) / (1/4)</gadget>
<output>14</output>

<gadget id="calculator">2 * 14</gadget>
<output>28</output>

<gadget id="calculator">28 + 3</gadget>
<output>31</output>

<result>31</result>