(1/2)+((1/4)+(3/4))+((1/6)+(3/6)+(5/6))+…+((1/100)+( 3/100)+(5/100)+...+(99/100))= how much.
(1/2)+((1/4)+(3/4))+((1/6)+(3/6)+(5/6))+…+((1/100)+(3/100)+(5/100)+…+(99/100))=多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + 50</gadget>
<output>51</output>

<gadget id="calculator">50 / 2</gadget>
<output>25</output>

<gadget id="calculator">51 * 25</gadget>
<output>1_275</output>

<gadget id="calculator">(1/2) * 1_275</gadget>
<output>1_275/2 = around 637.5</output>

<result>1_275/2 = around 637.5</result>