The students use a 13-meter-long rope to wrap around the trunk for 4 weeks, and the remainder is 0.44 meters. What is the diameter of this big tree in meters?
同学们用一根长13米的绳子，绕树干4周，余0.44米，这棵大树的直径是多少米？
<gadget id="calculator">13 - 0.44</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 / 4 / 3.14</gadget>
<output>1</output>

<result>1</result>