A/15=236...B, how much is A to maximize B.
A/15=236…B，要使B最大，A是多少．
<gadget id="calculator">236 * 15</gadget>
<output>3_540</output>

<gadget id="calculator">15 - 1</gadget>
<output>14</output>

<gadget id="calculator">3_540 + 14</gadget>
<output>3_554</output>

<result>3_554</result>