The sum of the dividend, divisor, quotient, and remainder is 77, the quotient is 9, and the remainder is 4. What is the divisor?
被除数、除数、商、余数相加的和是77，商是9，余数是4，除数是多少？
<gadget id="calculator">77 - 4 - 4 - 9</gadget>
<output>60</output>

<gadget id="calculator">9 + 1</gadget>
<output>10</output>

<gadget id="calculator">60 / 10</gadget>
<output>6</output>

<result>6</result>