Calculation: (5/(2*3))-(7/(3*4))+(9/(4*5))-(11/(5*6))+(13/(6*7) )-(15/(7*8)).
计算：(5/(2*3))-(7/(3*4))+(9/(4*5))-(11/(5*6))+(13/(6*7))-(15/(7*8))．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

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

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">(5/6) - (7/12)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<gadget id="calculator">9 / 20</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">11 / 30</gadget>
<output>11/30 = around 0.366667</output>

<gadget id="calculator">(9/20) - (11/30)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">6 * 7</gadget>
<output>42</output>

<gadget id="calculator">13 / 42</gadget>
<output>13/42 = around 0.309524</output>

<gadget id="calculator">7 * 8</gadget>
<output>56</output>

<gadget id="calculator">15 / 56</gadget>
<output>15/56 = around 0.267857</output>

<gadget id="calculator">(13/42) - (15/56)</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">(1/4) + (1/12) + (1/24)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>