The little sloppy miscalculated dividing a number by (3/7) into multiplying (3/7), and the result was 9. What should be the correct calculation result?
小马虎把一个数除以(3/7)错算成乘(3/7)，得到的结果是9，正确的计算结果应该是多少？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">9 / (3/7) / (3/7)</gadget>
<output>49</output>

<result>49</result>