When two numbers are divided, the quotient is 35 and the remainder is 20. What is the smallest dividend?
两个数相除，商是35，余数是20，被除数最小是多少．
<gadget id="calculator">21 * 35</gadget>
<output>735</output>

<gadget id="calculator">735 + 20</gadget>
<output>755</output>

<result>755</result>