The number of students in the fifth grade in a certain school is 19 less than that in the fourth grade. If the fifth grade repeats 3 students to the fourth grade, the number of fifth grade students is 87.5% of the fourth grade. How many students are there in the fourth grade?
某校五年级人数比四年级少19人，如果五年级再留级3人到四年级，则五年级人数是四年级的87.5%，四年级有多少人？
<gadget id="calculator">19 + 3 + 3</gadget>
<output>25</output>

<gadget id="calculator">87.5 / 100</gadget>
<output>0.875</output>

<gadget id="calculator">1 - 0.875</gadget>
<output>0.125</output>

<gadget id="calculator">25 / 0.125</gadget>
<output>200</output>

<gadget id="calculator">200 - 3</gadget>
<output>197</output>

<result>197</result>