In a division expression, the quotient and remainder are both 5, and the sum of the dividend, divisor, quotient and remainder is 81, what is the divisor?
在一个除法算式里，商和余数都是5，并且被除数、除数、商和余数的和是81，除数是多少？
<gadget id="calculator">81 - 5 - 5 - 5</gadget>
<output>66</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">66 / 6</gadget>
<output>11</output>

<result>11</result>