A village builds a cuboid reservoir with a length of 18 meters and a width of 9 meters. How many tons of water are needed to store water to a depth of 5 meters? (1 meter * 3 water weight 1 ton)
某村修建一个长方体蓄水池，长18米，宽9米．若要蓄水5米深，需要多少吨水？(1米**3水重1吨)
<gadget id="calculator">18 * 9 * 5 * 1</gadget>
<output>810</output>

<result>810</result>