The school has a circular pool with a radius of 5 meters. If a lawn with a width of 1 meter is planted around the pool, it costs about 12 yuan per square meter of lawn. How much is the minimum investment for the school?
学校有一个半径是5米的圆形水池，如果绕水池一周种植宽1米的草坪，每平方米草坪大约用12元，学校最少要投入多少元？
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

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

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">36 - 25</gadget>
<output>11</output>

<gadget id="calculator">3.14 * 11 * 12</gadget>
<output>414.48</output>

<result>414.48</result>