△/7=7…□, what is the maximum value of △
△/7=7…□中，△最大是多少
<gadget id="calculator">7 * 7</gadget>
<output>49</output>

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

<gadget id="calculator">49 + 6</gadget>
<output>55</output>

<result>55</result>