Some homework books are less than 60, and they are distributed to 7 students or 8 students on average, and there is only 1 book left. How many homework books are there?
一些作业本不到60本，平均分给7个学生或8个学生，都剩1本，作业本有多少本．
<gadget id="calculator">7 * 8</gadget>
<output>56</output>

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

<result>57</result>