When Xiaoli calculated a division formula, she mistakenly wrote the dividend 21.6 as 12.6, and the resulting quotient was exactly 3.75 smaller than the original. What is the correct quotient.
小丽计算一道除法算式时，错把被除数21.6写成了12.6，结果商正好比原来小了3.75．正确的商是多少．
<gadget id="calculator">21.6 - 12.6</gadget>
<output>9</output>

<gadget id="calculator">9 / 3.75</gadget>
<output>2.4</output>

<gadget id="calculator">21.6 / 2.4</gadget>
<output>9</output>

<result>9</result>