A, B, and C are running a race. It is known that A is faster than B (1/11), and B is 10% faster than C. How much faster is A than C?
甲、乙、丙三人赛跑，已知甲速比乙速快(1/11)，而乙速又比丙速快10%，则甲速比丙速快多少．
<gadget id="calculator">1 / 11</gadget>
<output>1/11 = around 0.090909</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">1 / (11/10)</gadget>
<output>10/11 = around 0.909091</output>

<gadget id="calculator">(1/11) - (10/11)</gadget>
<output>-9/11 = around -0.818182</output>

<gadget id="calculator">1 + (-9/11)</gadget>
<output>2/11 = around 0.181818</output>

<gadget id="calculator">(2/11) / (10/11)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>