((1/2)+(1/3)+(1/4)+...+(1/30))+((2/3)+(2/4)+(2/5)+...+( 2/30))+((3/4)+(3/5)+(3/6)+…+(3/30))+…+((28/29)+(28/30))+ (29/30).
((1/2)+(1/3)+(1/4)+…+(1/30))+((2/3)+(2/4)+(2/5)+…+(2/30))+((3/4)+(3/5)+(3/6)+…+(3/30))+…+((28/29)+(28/30))+(29/30)．
<gadget id="calculator">1 + 29</gadget>
<output>30</output>

<gadget id="calculator">29 / 2</gadget>
<output>29/2 = around 14.5</output>

<gadget id="calculator">30 * (29/2)</gadget>
<output>435</output>

<gadget id="calculator">435 / 2</gadget>
<output>435/2 = around 217.5</output>

<result>435/2 = around 217.5</result>