□/30=12…□, to make the dividend as large as possible, what is the dividend equal to
□/30=12…□，要使被除数尽可能的大，那么被除数等于多少
<gadget id="calculator">12 * 30</gadget>
<output>360</output>

<gadget id="calculator">30 - 1</gadget>
<output>29</output>

<gadget id="calculator">360 + 29</gadget>
<output>389</output>

<result>389</result>