Class 62 has 12.5% more people than Class 61. There are 45 people in Class 62. How many people are there in Class 61?
六二班人数比六一班多12.5%，六二班有45人，六一班有多少人？
<gadget id="calculator">12.5 / 100</gadget>
<output>0.125</output>

<gadget id="calculator">1 + 0.125</gadget>
<output>1.125</output>

<gadget id="calculator">45 / 1.125</gadget>
<output>40</output>

<result>40</result>