0.1+0.3+0.5+0.7+0.9+0.11+0.13+0.15+0.17+0.19+0.21+...+0.99=how many.
0.1+0.3+0.5+0.7+0.9+0.11+0.13+0.15+0.17+0.19+0.21+…+0.99=多少．
<gadget id="calculator">0.1 + 0.9</gadget>
<output>1</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">1 * (5/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">0.11 + 0.99</gadget>
<output>1.1</output>

<gadget id="calculator">45 / 2</gadget>
<output>45/2 = around 22.5</output>

<gadget id="calculator">1.1 * (45/2)</gadget>
<output>24.75</output>

<gadget id="calculator">(5/2) + 24.75</gadget>
<output>27.25</output>

<result>27.25</result>