A fraction, the numerator is 20 greater than the denominator, the result of reducing it to the simplest fraction is (7/3). What is the original score?
一个分数，分子比分母大20，将它化为最简分数结果是(7/3)．原来这个分数是多少？
<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">5 * (7/15)</gadget>
<output>7/3 = around 2.333333</output>

<result>7/3 = around 2.333333</result>