Children play the hoop game. On average, 6 people get 5 rabbits, 15 people get 2 kittens, and 10 people get 1 monkey. As a result, each animal toy is 4 more. Please participate in the hoop How many children are there?
小朋友玩套圈游戏，平均6人套得5只小兔，15人套得2只小猫，10人套得1只小猴，结果每人1只动物玩具还多4只，求参加套圈的小朋友有多少人？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) - 1</gadget>
<output>-9/10 = around -0.9</output>

<gadget id="calculator">(5/6) + (2/15) + (-9/10)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">4 / (1/15)</gadget>
<output>60</output>

<result>60</result>