The school bunker is 5 meters long, 3 meters wide, and 0.5 meters deep. Each cubic meter of sand weighs 1,200 kilograms. How many tons of sand are needed to fill the bunker?
学校沙坑长5米，宽3米，深0.5米，每立方米沙重1200千克，填满这个沙坑需要多少吨沙？
<gadget id="calculator">5 * 3 * 0.5</gadget>
<output>7.5</output>

<gadget id="calculator">1.2 * 7.5</gadget>
<output>9</output>

<result>9</result>