A roller is a cylinder with a base radius of 1 meter and a length of 1.5 meters. If it turns 5 times, how many square meters will the total pressure be.
一种压路机滚筒是一个圆柱体，它的底面半径是1米，长是1.5米．如果它转5圈，一共压路多少平方米．
<gadget id="calculator">3.14 * 1 * 2 * 5 * 1.5</gadget>
<output>47.1</output>

<result>47.1</result>