Four students A, B, C, and D went to the forest to pick mushrooms. The integer part of the average number of mushrooms collected by each person is a two-digit number whose tens digit is 3. It is also known that the amount picked by A is (4/5) that of B, and the amount picked by B is (3/2) times that of C. Ding Bijia picks 3 more mushrooms. So, how many Dingcai mushrooms.
有甲、乙、丙、丁四个同学去林中采蘑菇．平均每人采得的蘑菇的个数的整数部分是一个十位数为3的两位数．又知甲采的数量是乙的(4/5)，乙采的数量是丙的(3/2)倍．丁比甲多采3个蘑菇．那么，丁采蘑菇多少个．
<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(6/5) * 30</gadget>
<output>36</output>

<gadget id="calculator">36 + 3</gadget>
<output>39</output>

<result>39</result>