A 15-meter-long rope is 2 meters, 4 decimeters, and 4 centimeters left after wrapping it twice around the tree at a height of 3 meters above the ground. What is the diameter of the place where the big tree is wrapped?
一根15米长的绳子，在离地面3米高的地方绕树2圈后还余2米4分米4厘米，这棵大树被绕的地方直径是多少？
<gadget id="calculator">15 - 2.44</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 / 2 / 3.14</gadget>
<output>2</output>

<result>2</result>