What is the difference between 81 minus 27 divided by the quotient of the largest single digit?
81减去27除以最大一位数的商，差是多少？
<gadget id="calculator">27 / 9</gadget>
<output>3</output>

<gadget id="calculator">81 - 3</gadget>
<output>78</output>

<result>78</result>