After reducing its (1/10) from 100 tons, how many tons is it to increase by 10%.
100吨减少它的(1/10)后，又增加10%是多少吨．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">10 / 100</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">100 * (9/10) * (11/10)</gadget>
<output>99</output>

<result>99</result>