A cylindrical oil barrel has a radius of 10 decimeters and a height of 50 decimeters. How many liters of gasoline can this oil barrel hold?
一个圆柱形的油桶，量得它内部的底面半径是10分米，高为50分米，这只油桶最多可以装汽油多少升？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 50</gadget>
<output>15_700</output>

<result>15_700</result>