When two numbers are divided, the quotient is 20 and the remainder is 11. When the divisor takes the minimum value, what is the dividend?
两数相除，商20余11，当除数取最小值时，被除数是多少．
<gadget id="calculator">11 + 1</gadget>
<output>12</output>

<gadget id="calculator">12 * 20</gadget>
<output>240</output>

<gadget id="calculator">240 + 11</gadget>
<output>251</output>

<result>251</result>