When two numbers are divided, the quotient is 15, the remainder is 20, the divisor is 8 more than the remainder, what is the dividend?
两数相除，商是15，余数是20，除数比余数多8，被除数是多少？
<gadget id="calculator">20 + 8</gadget>
<output>28</output>

<gadget id="calculator">15 * 28</gadget>
<output>420</output>

<gadget id="calculator">420 + 20</gadget>
<output>440</output>

<result>440</result>