If stipulated: 1△=1, 2△=1*(1/2), 3△=1*(1/2)*(1/3); 4△=1*(1/2)*(1/ 3)*(1/4), calculate the value of (7△)/(5△).
若规定：1△=1，2△=1*(1/2)，3△=1*(1/2)*(1/3)；4△=1*(1/2)*(1/3)*(1/4)，求(7△)/(5△)的值．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

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

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 * (1/2) * (1/3) * (1/4) * (1/5) * (1/6) * (1/7)</gadget>
<output>1/5_040 = around 0.000198</output>

<gadget id="calculator">1 * (1/2) * (1/3) * (1/4) * (1/5)</gadget>
<output>1/120 = around 0.008333</output>

<gadget id="calculator">(1/5_040) / (1/120)</gadget>
<output>1/42 = around 0.02381</output>

<result>1/42 = around 0.02381</result>