The drum of a planter is a cylinder, the diameter of the bottom surface and the length of the drum are both 1m, how many m**2 can be sown by rolling 300 times?
一台播种机的滚筒是一个圆柱体，底面直径和筒长都是1m，滚动300圈共可播种多少m**2．
<gadget id="calculator">3.14 * 1 * 1 * 300</gadget>
<output>942</output>

<result>942</result>