A class of fifth grade students do exercises, if there is one less student in 8 rows, and one less student in 10 rows, at least how many people are there in this class?
五年级一班同学做操，排成8排少1人，排成10排也少1人，这个班至少有多少人？
<gadget id="calculator">2 * 2 * 2 * 5</gadget>
<output>40</output>

<gadget id="calculator">40 - 1</gadget>
<output>39</output>

<result>39</result>