In □/□=40…41, to make the divisor the smallest, what should be the dividend.
在□/□=40…41中，要使除数最小，被除数应是多少．
<gadget id="calculator">40 * 42</gadget>
<output>1_680</output>

<gadget id="calculator">1_680 + 41</gadget>
<output>1_721</output>

<result>1_721</result>