Xiao Min puts a group of ducks by the river, and the ducks on the bank are in the water (3/4). If 9 ducks land from the water, then the number of ducks in the water is equal to the number of ducks on the bank. How many ducks are there on the bank?
小敏在河边放一群鸭子，岸上鸭子是水中的(3/4)，如果从水中上岸9只鸭子，那么水中与岸上的鸭子数相等，原来岸上有几只鸭子？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(1/2) - (3/7)</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">9 / (1/14)</gadget>
<output>126</output>

<gadget id="calculator">126 * (3/7)</gadget>
<output>54</output>

<result>54</result>