A circular runway has an inner diameter of 100 meters and a width of 6 meters. If plastic is to be laid on the runway, what is the area of the part covered with plastic in square meters?
一个圆环形跑道的内直径为100米，跑道宽6米．要在跑道上铺塑胶，那么铺塑胶的部分面积是多少平方米．
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">100 + 12</gadget>
<output>112</output>

<gadget id="calculator">112 / 2</gadget>
<output>56</output>

<gadget id="calculator">56 ** 2</gadget>
<output>3_136</output>

<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">50 ** 2</gadget>
<output>2_500</output>

<gadget id="calculator">3_136 - 2_500</gadget>
<output>636</output>

<gadget id="calculator">636 * 3.14</gadget>
<output>1_997.04</output>

<result>1_997.04</result>