0.1+0.2+0.3+...+0.9+0.10+0.11+...0.98+0.99.
0.1+0.2+0.3+…+0.9+0.10+0.11+…0.98+0.99．
<gadget id="calculator">0.1 + 0.9</gadget>
<output>1</output>

<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">1 * (9/2)</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">0.1 + 0.99</gadget>
<output>1.09</output>

<gadget id="calculator">90 / 2</gadget>
<output>45</output>

<gadget id="calculator">1.09 * 45</gadget>
<output>49.05</output>

<gadget id="calculator">(9/2) + 49.05</gadget>
<output>53.55</output>

<result>53.55</result>