(1/1)+(1/2)+(2/2)+(1/2)+(1/3)+(2/3)+(3/3)+(2/3)+(1 /3)+(1/4)+(2/4)+(3/4)+(4/4)+(3/4)+(2/4)+(1/4)=how much.
(1/1)+(1/2)+(2/2)+(1/2)+(1/3)+(2/3)+(3/3)+(2/3)+(1/3)+(1/4)+(2/4)+(3/4)+(4/4)+(3/4)+(2/4)+(1/4)=多少．
<gadget id="calculator">1 / 1</gadget>
<output>1</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

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

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

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

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">1 + (1/2) + 1 + (1/2) + (1/3) + (2/3) + 1 + (2/3) + (1/3) + (1/4) + (1/2) + (3/4) + 1 + (3/4) + (1/2) + (1/4)</gadget>
<output>10</output>

<result>10</result>