□/7=56…□, to maximize the remainder, what should be the dividend
□/7=56…□，要使余数最大，被除数应为多少
<gadget id="calculator">7 * 56</gadget>
<output>392</output>

<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">392 + 6</gadget>
<output>398</output>

<result>398</result>