The whole class works in groups. There is one person left in every group of 7 or 8 people. How many people are there in the class?
全班同学分组劳动，每7人一组或是每8人一组都剩1人，全班一共有多少人．
<gadget id="calculator">7 * 8</gadget>
<output>56</output>

<gadget id="calculator">56 + 1</gadget>
<output>57</output>

<result>57</result>