In a division formula, the quotient is 30 and the remainder is 81. When the divisor is the smallest, what is the dividend.
在一道除法算式里，商是30，余数是81，当除数最小时，被除数是多少．
<gadget id="calculator">81 + 1</gadget>
<output>82</output>

<gadget id="calculator">82 * 30</gadget>
<output>2_460</output>

<gadget id="calculator">2_460 + 81</gadget>
<output>2_541</output>

<result>2_541</result>