When a number is divided by 34, the quotient is 17 and the remainder is 21. What is the number?
一个数除以34，商是17，还余21，这个数是多少．
<gadget id="calculator">17 * 34</gadget>
<output>578</output>

<gadget id="calculator">578 + 21</gadget>
<output>599</output>

<result>599</result>