The construction site brought 3 trucks of cement, each with 30 bags, and each bag weighed about 51 kilograms. How many kilograms of these cements weighed together?
工地拉来3车水泥，每车30包，每包的重量约51千克，这些水泥共重多少千克？
<gadget id="calculator">3 * 30 * 51</gadget>
<output>4_590</output>

<result>4_590</result>