Xiaoming, Xiaojun, Xiaofang and Xiaohong make thousands of origami cranes together, the number of Xiaoming's is the total number made by the other three people (7/13), the number of Xiaojun's is only the number of other three people's Of the total number (1/3), the number made by Xiaofang is the total number made by the other three (11/29), and Xiaohong made 15 pieces. How many paper cranes did they make in total?
小明、小军、小芳和小红四人一起做千纸鹤，小明做的只数是其他三人做的总只数的(7/13)，小军做的只数是其他三人做的总只数的(1/3)，小芳做的只数是其他三人做的总只数的(11/29)，小红做了15只．他们一共做了多少只千纸鹤？
<gadget id="calculator">7 + 13</gadget>
<output>20</output>

<gadget id="calculator">7 / 20</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

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

<gadget id="calculator">11 + 29</gadget>
<output>40</output>

<gadget id="calculator">11 / 40</gadget>
<output>11/40 = around 0.275</output>

<gadget id="calculator">1 - (7/20) - (1/4) - (11/40)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">15 / (1/8)</gadget>
<output>120</output>

<result>120</result>