①(5/7)+(5/6)+(2/7)+(1/6)②(5/8)*(1/9)*(4/5)③2-(6/13)/ (9/26)-(2/3)④(3/4)*(2/5)+(3/5)/(4/3).
①(5/7)+(5/6)+(2/7)+(1/6)②(5/8)*(1/9)*(4/5)③2-(6/13)/(9/26)-(2/3)④(3/4)*(2/5)+(3/5)/(4/3)．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(5/7) + (5/6) + (2/7) + (1/6)</gadget>
<output>2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/4) * (2/5)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(3/5) / (4/3)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">(3/10) + (9/20)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>