The fourth and fifth grade students of Sunshine Primary School donated a total of 2,895 yuan, including 45 fourth grade students, with an average donation of 21 yuan per person. The average donation per person in the fifth grade is twice the average donation per person in the fourth grade and less than 3 yuan. How many fifth grade students are there?
阳光小学四、五年级学生共捐款2895元，其中四年级学生45人，平均每人捐款21元．五年级平均每人捐款是四年级平均每人捐款的2倍少3元，五年级学生有多少．
<gadget id="calculator">21 * 45</gadget>
<output>945</output>

<gadget id="calculator">2_895 - 945</gadget>
<output>1_950</output>

<gadget id="calculator">21 * 2</gadget>
<output>42</output>

<gadget id="calculator">42 - 3</gadget>
<output>39</output>

<gadget id="calculator">1_950 / 39</gadget>
<output>50</output>

<result>50</result>