Xiao Ming came to a relative's house in the countryside and saw a cylindrical grain pile. He used a 6.28-meter-long rope to go around the grain pile, and measured the grain pile to be 3 meters high. How many cubic meters of grain is there in this grain pile?
小明来到农村的亲戚家，看到一个圆柱形粮堆．他用一根长6.28米的绳子正好能绕粮堆一周，量得粮堆高3米．这个粮堆大约有粮食多少立方米？
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 3</gadget>
<output>9.42</output>

<result>9.42</result>