(1/2)*(3/7)+(4/5)=how much.
(1/2)*(3/7)+(4/5)=多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(1/2) * (3/7)</gadget>
<output>3/14 = around 0.214286</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(3/14) + (4/5)</gadget>
<output>71/70 = around 1.014286</output>

<result>71/70 = around 1.014286</result>