Calculation: (1/42)+(1/56)+(1/72)+(1/90)+(1/110)=how much.
计算：(1/42)+(1/56)+(1/72)+(1/90)+(1/110)=多少．
<gadget id="calculator">1 / 42</gadget>
<output>1/42 = around 0.02381</output>

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

<gadget id="calculator">1 / 72</gadget>
<output>1/72 = around 0.013889</output>

<gadget id="calculator">1 / 90</gadget>
<output>1/90 = around 0.011111</output>

<gadget id="calculator">1 / 110</gadget>
<output>1/110 = around 0.009091</output>

<gadget id="calculator">(1/42) + (1/56) + (1/72) + (1/90) + (1/110)</gadget>
<output>5/66 = around 0.075758</output>

<result>5/66 = around 0.075758</result>