When two numbers are divided, the quotient is 5 and the remainder is 20. What is the minimum dividend.
两个数相除，商是5，余数是20．被除数最小是多少．
<gadget id="calculator">21 * 5</gadget>
<output>105</output>

<gadget id="calculator">105 + 20</gadget>
<output>125</output>

<result>125</result>