8.4*((5+5)/5)*(8/8)=how much.
8.4*((5+5)/5)*(8/8)=多少．
<gadget id="calculator">5 + 5</gadget>
<output>10</output>

<gadget id="calculator">10 / 5</gadget>
<output>2</output>

<gadget id="calculator">8 / 8</gadget>
<output>1</output>

<gadget id="calculator">8.4 * 2 * 1</gadget>
<output>16.8</output>

<result>16.8</result>