A cylindrical oil barrel has a circumference of 18.84 decimeters at the bottom and a depth of 15 decimeters inside. How many liters of oil can this barrel hold?
一个圆柱形的油桶，底面周长是18.84分米，里面量得深15分米．这个油桶能装油多少升？
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 15</gadget>
<output>423.9</output>

<result>423.9</result>