On a small tree with a diameter of 15 cm, wrap 30 turns of straw rope. How many meters is this straw rope?
在一棵直径15厘米的小树上，缠绕上30圈的草绳．这根草绳长多少米？
<gadget id="calculator">3.14 * 15 * 30</gadget>
<output>1_413</output>

<gadget id="calculator">1_413 / 100</gadget>
<output>1_413/100 = around 14.13</output>

<result>1_413/100 = around 14.13</result>