cylindrical oil barrel has a base radius of 3 decimeters and a height of 1 meter. Gasoline weighs 0.7 kilograms per liter. How many kilograms of gasoline can this barrel hold?
一个圆柱形油桶，量得底面半径3分米，高1米．每升汽油重0.7千克，这个油桶最多可装汽油多少千克？
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 1 * 0.7</gadget>
<output>19.782</output>

<result>19.782</result>