The school wants to buy pencil cases of different grades as prizes, among which 5 are high-grade, low-grade ones account for 75% of the total, and mid-grade ones account for 1/6 of the total. How many stationery boxes does the school need to buy in total?
学校要买不同档次的文具盒作为奖品，其中高档的5个，低档的占总数的75%，中档的占总数的(1/6)．学校一共要买多少个文具盒？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (3/4) - (1/6)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">5 / (1/12)</gadget>
<output>60</output>

<result>60</result>