A fraction converted to a decimal is 0.45. If the numerator of this fraction is reduced to the original (1/3), and the denominator is expanded to 3 times the original, what is the fraction?
一个分数化成小数后是0.45，如果这个分数的分子缩小到原来的(1/3)，分母扩大到原来的3倍，再化成小数是多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">45 * (1/3)</gadget>
<output>15</output>

<gadget id="calculator">100 * 3</gadget>
<output>300</output>

<gadget id="calculator">15 / 300</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>