(3/7)/5+(1/5)*(4/7).
(3/7)/5+(1/5)*(4/7)．
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(3/7) / 5</gadget>
<output>3/35 = around 0.085714</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(1/5) * (4/7)</gadget>
<output>4/35 = around 0.114286</output>

<gadget id="calculator">(3/35) + (4/35)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>