((1/2)+(1/3)+...+(1/10))+((2/3)+(2/4)+...+(2/10))+...+((8/ 9)+(8/10))+(9/10).
((1/2)+(1/3)+…+(1/10))+((2/3)+(2/4)+…+(2/10))+…+((8/9)+(8/10))+(9/10)．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">28 * (1/8)</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/9) + (1/10)</gadget>
<output>19/90 = around 0.211111</output>

<gadget id="calculator">36 * (19/90)</gadget>
<output>38/5 = around 7.6</output>

<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">8 + (5/2) + (7/2) + (38/5) + (9/10)</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>