(1/7)*2=((()*())/(()))=how much.
(1/7)*2=((()*())/(()))=多少．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(1/7) * 2</gadget>
<output>2/7 = around 0.285714</output>

<result>2/7 = around 0.285714</result>