(1/13)-(1/23)+(1/299)-(1/429)=how much.
(1/13)-(1/23)+(1/299)-(1/429)=多少．
<gadget id="calculator">1 / 13</gadget>
<output>1/13 = around 0.076923</output>

<gadget id="calculator">1 / 23</gadget>
<output>1/23 = around 0.043478</output>

<gadget id="calculator">1 - (1/23)</gadget>
<output>22/23 = around 0.956522</output>

<gadget id="calculator">(1/13) * (22/23)</gadget>
<output>22/299 = around 0.073579</output>

<gadget id="calculator">1 + (1/13)</gadget>
<output>14/13 = around 1.076923</output>

<gadget id="calculator">(1/23) * (14/13)</gadget>
<output>14/299 = around 0.046823</output>

<gadget id="calculator">(22/299) - (14/299)</gadget>
<output>8/299 = around 0.026756</output>

<result>8/299 = around 0.026756</result>