For a simple fraction, the sum of the numerator and the denominator is 52. If the numerator is subtracted from 3 and the denominator is subtracted from 1, the new fraction obtained after simplification is (1/3). What is the original fraction?
一个最简分数，分子、分母的和是52，若分子减去3，分母减去1，所得新分数化简后为(1/3)，原分数是多少．
<gadget id="calculator">52 - 4</gadget>
<output>48</output>

<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">48 * (1/4)</gadget>
<output>12</output>

<gadget id="calculator">12 + 3</gadget>
<output>15</output>

<gadget id="calculator">48 - 12</gadget>
<output>36</output>

<gadget id="calculator">36 + 1</gadget>
<output>37</output>

<gadget id="calculator">15 / 37</gadget>
<output>15/37 = around 0.405405</output>

<result>15/37 = around 0.405405</result>