Uncle Li went to the store and bought 2 bottles of wine. The diameter of the bottom of the wine bottle is 10 cm. The salesperson tied the 2 bottles of wine together. How much rope would it take to tie 3 turns?
李叔叔到商店买了2瓶酒，酒瓶的底面直径是10厘米，售货员将2瓶酒捆扎在一起，捆3圈要多少绳子？
<gadget id="calculator">3.14 * 10</gadget>
<output>31.4</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">31.4 + 20</gadget>
<output>51.4</output>

<gadget id="calculator">51.4 * 3</gadget>
<output>154.2</output>

<result>154.2</result>