When two numbers are divided, the quotient is 7 and the remainder is 5. The sum of dividend, divisor, quotient and remainder is 161. what is the divisor
两数相除，商是7，余数是5．被除数，除数，商与余数的和是161．除数是多少
<gadget id="calculator">161 - 5 - 5 - 7</gadget>
<output>144</output>

<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<gadget id="calculator">144 / 8</gadget>
<output>18</output>

<result>18</result>