Xiaoqing did a division calculation problem, reversed the tens and ones digits of the dividend, and after dividing by 9, the resulting quotient was 4, and asked what the correct quotient should be.
小青做一道除法算式题，把被除数的十位和个位数字看颠倒了，除以9后，结果商是4，问正确的商应该是多少．
<gadget id="calculator">63 / 9</gadget>
<output>7</output>

<result>7</result>