a/34=25...b, when b is the largest, how much is a=?
a/34=25…b，b最大时则a=多少．
<gadget id="calculator">25 * 34</gadget>
<output>850</output>

<gadget id="calculator">34 - 1</gadget>
<output>33</output>

<gadget id="calculator">850 + 33</gadget>
<output>883</output>

<result>883</result>