The quotient and remainder of a number divided by 7 are the same, what is the largest number.
一个数除以7的商和余数相同，这个数最大是多少．
<gadget id="calculator">6 * 7</gadget>
<output>42</output>

<gadget id="calculator">42 + 6</gadget>
<output>48</output>

<result>48</result>