a/19=207...b is integer division. To maximize the value of b, what should be the value of a.
a/19=207…b是整数除法，要使b的值最大，a应是多少．
<gadget id="calculator">207 * 19</gadget>
<output>3_933</output>

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

<gadget id="calculator">3_933 + 18</gadget>
<output>3_951</output>

<result>3_951</result>