A road with a width of 2 meters is built along a circular flower bed with a diameter of 12 meters. If the cost per square meter of the road surface is 400 yuan, how much is the total cost of building the road?
沿直径为12m的圆形花坛修建一条宽2米的路，如果路面每平方米的造价为400元，则建完这条路共需多少元？
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 + 2</gadget>
<output>8</output>

<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">3.14 * 64</gadget>
<output>200.96</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<gadget id="calculator">200.96 - 113.04</gadget>
<output>87.92</output>

<gadget id="calculator">87.92 * 400</gadget>
<output>35_168</output>

<result>35_168</result>