The long jump field of the school playground is a cuboid bunker, 6 meters long and 1.8 meters wide. To fill with 40 cm thick sand, each cubic meter of sand weighs 1.5 tons. How many tons of sand are needed in total?
学校操场的跳远场是一个长方体沙坑，长6米，宽1.8米．要填40厘米厚的沙子，每立方米沙子重1.5吨．共需要沙子多少吨？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">6 * 1.8 * (2/5) * 1.5</gadget>
<output>6.48</output>

<result>6.48</result>