There is a set of fractions arranged as follows: (1/3), (1/4), (1/5), (1/3), (1/4), (1/5), (1/3), (1 /4), (1/5), .... What is the sum of the first 180 numbers in this sequence.
有一组分数如下排列：(1/3)、(1/4)、(1/5)、(1/3)、(1/4)、(1/5)、(1/3)、(1/4)、(1/5)、…．这个数列前180个数的和是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/3) + (1/4) + (1/5)</gadget>
<output>47/60 = around 0.783333</output>

<gadget id="calculator">180 / 3</gadget>
<output>60</output>

<gadget id="calculator">(47/60) * 60</gadget>
<output>47</output>

<result>47</result>