When Xiao Ming calculates "84-□/4", he does the subtraction first and then the division, and the result is 6. What is the correct number for this question?
小明在计算"84-□/4"时，先算减法，后算除法，得到的结果是6．这道题的正确得数是多少？
<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">84 - 24</gadget>
<output>60</output>

<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<gadget id="calculator">84 - 15</gadget>
<output>69</output>

<result>69</result>