(2/5)+((6/7)+(3/35))*7.
(2/5)+((6/7)+(3/35))*7．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">3 / 35</gadget>
<output>3/35 = around 0.085714</output>

<gadget id="calculator">(6/7) + (3/35)</gadget>
<output>33/35 = around 0.942857</output>

<gadget id="calculator">(33/35) * 7</gadget>
<output>33/5 = around 6.6</output>

<gadget id="calculator">(2/5) + (33/5)</gadget>
<output>7</output>

<result>7</result>