Calculation: (1/(1*6))+(1/(6*11))+(1/(11*16))+…+(1/(51*56)).
计算：(1/(1*6))+(1/(6*11))+(1/(11*16))+…+(1/(51*56))．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 56</gadget>
<output>1/56 = around 0.017857</output>

<gadget id="calculator">1 - (1/56)</gadget>
<output>55/56 = around 0.982143</output>

<gadget id="calculator">(1/5) * (55/56)</gadget>
<output>11/56 = around 0.196429</output>

<result>11/56 = around 0.196429</result>