Yuxin Primary School newly dug a cuboid bunker, 4 meters long, 2 meters wide, and 50 cm deep. How much yellow sand is needed to fill it?
育新小学新挖一个长方体的沙坑，长4米，宽2米，深50厘米，需要多少黄沙才能填满？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 * 2 * (1/2)</gadget>
<output>4</output>

<result>4</result>