7*(1/7)/7*(1/7)=how much
7*(1/7)/7*(1/7)=多少
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(1/7) / 7</gadget>
<output>1/49 = around 0.020408</output>

<gadget id="calculator">7 * (1/49) * (1/7)</gadget>
<output>1/49 = around 0.020408</output>

<result>1/49 = around 0.020408</result>