certain class of students happens to stand in an 8*8 square formation in the military training queue performance. If these students are asked to stand guard on a 250-meter-long straight road, starting from one end and standing at intervals of 5 meters, then when they are full, How many people are left?
某班同学在军训队列表演中恰好站成一个8*8的方阵，若让这些同学在一条250米长的笔直的马路上站岗，以一端开始每隔5米站一个人，则站满之后还剩下多少人？
<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<gadget id="calculator">250 / 5</gadget>
<output>50</output>

<gadget id="calculator">50 + 1</gadget>
<output>51</output>

<gadget id="calculator">64 - 51</gadget>
<output>13</output>

<result>13</result>