Given that the divisor is 19 and the quotient is 9, what is the dividend when the remainder takes the maximum value.
已知除数是19，商是9，当余数取最大值时，被除数是多少．
<gadget id="calculator">9 * 19</gadget>
<output>171</output>

<gadget id="calculator">19 - 1</gadget>
<output>18</output>

<gadget id="calculator">171 + 18</gadget>
<output>189</output>

<result>189</result>