Divide a fraction, first with 2, then with 7, the result is (3/4). What was the original score?
把一个分数约分，先用2约一次，再用7约一次的结果是(3/4)．原来的分数是多少？
<gadget id="calculator">4 * 7 * 2</gadget>
<output>56</output>

<gadget id="calculator">2 / 56</gadget>
<output>1/28 = around 0.035714</output>

<gadget id="calculator">3 * 7 * (1/28)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>