10 cubic meters of water is increased by (1/10) and then decreased by (1/10), what is the result in cubic meters?
10立方米的水增加(1/10)后，再减少(1/10)，结果为多少立方米．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">10 * (11/10) * (9/10)</gadget>
<output>99/10 = around 9.9</output>

<result>99/10 = around 9.9</result>