The sum of dividend, divisor, and quotient is 441. It is known that the quotient is 16. What is the dividend?
被除数、除数、商的和是441，已知商是16，被除数是多少．
<gadget id="calculator">441 - 16</gadget>
<output>425</output>

<gadget id="calculator">16 + 1</gadget>
<output>17</output>

<gadget id="calculator">425 / 17</gadget>
<output>25</output>

<gadget id="calculator">25 * 16</gadget>
<output>400</output>

<result>400</result>